Links

Intro to bash completion

Basics

Most Debian installed bash completions live under /usr/share/bash_completion/completions

# the first argument ($1) is the name of the command whose  arguments are being completed
# the second argument ($2) is the word being completed,
# and the third argument ($3) is the word preceding the word  being  completed  on the current command line
# In the context of this function the following variables are defined:
# COMP_LINE, COMP_POINT, COMP_KEY, and COMP_TYPE
# as well as COMP_WORDS and COMP_CWORD
#  It must put the possible completions in the COMPREPLY array
# See bash(1) '^  Programmable Completion' for more information
_some_function() {
  local cur cmd
  cur=${COMP_WORDS[$COMP_CWORD]}
  cmd=( "${COMP_WORDS[@]}" )
}
complete -F _some_function command

complete options

Some complete options you want:

• -o bashdefault - if no completions are found do the bash default thing
• -o default - readline completions if both the complete function and bash expansions fail
• -o nospace - don’t append a space at the end of matches (useful if you’re doing directory stuffs)
• -S or -P - a prefix or suffix that is added at the end of a completion generated by the function passed to complete -F

Example

# Many of the ideas presented in this script were stolen
# in-part or wholesale from
# <https://github.com/git/git/blob/master/contrib/completion/git-completion.bash>
__scap_subcommands=
__scap_get_subcommands() {
    if [ -n "$__scap_subcommands" ]; then
        return
    fi

    __scap_subcommands=$(scap --_autocomplete)
}

_scap() {
    local cur cmd=() sub rep

    cur=${COMP_WORDS[$COMP_CWORD]}
    cmd=( "${COMP_WORDS[@]}" )

    if (( COMP_CWORD == 1 )); then
        __scap_get_subcommands
        rep=$( compgen -W "$__scap_subcommands" -- "$cur" )
        COMPREPLY=( $rep )
        return
    fi

    # limit the command to autocomplete to the first 3 words
    if (( COMP_CWORD >= 2 )); then
        # don't complete any sub-subcommands, only options
        if [[ -n "$cur" && "${cur:0:1}" != '-' ]]; then
            COMPREPLY=()
            return
        fi
        cmd=( "${COMP_WORDS[@]:0:3}" )
    fi

    # replace the last word in the command with '--_autocomplete'
    cmd[ $(( ${#cmd[@]} - 1 )) ]='--_autocomplete'

    rep=$( compgen -W "$( ${cmd[@]} )" -- "$cur" )

    COMPREPLY=( $rep )
}

# By default append nospace except when completion comes from _scap
complete -S' ' -o bashdefault -o default -o nospace -F _scap scap

Check setup

• ruby -v
• gem list selenium
• gem install selenium-webdriver
• Firefox
• IRB

Ruby install

❯ curl -fsSL https://gist.github.com/mislav/055441129184a1512bb5.txt | \
  rbenv install --patch 2.2.3
~ 6m 50s
❯ rbenv global 2.2.2
~
❯ ruby -v
ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]
~
❯ echo "gem: --no-ri --no-rdoc" > ~/.gemrc
~

Selenium webdriver

require "selenium-webdriver" https://code.google.com/p/selenium/wiki/RubyBindings

driver.class http://www.rubydoc.info/gems/selenium-webdriver/Selenium/WebDriver/Driver

Core tests

[mw-core]/tests/browser/features/create_account.feature

Schenario Outline can be passed variable

Scenario: [English text] # Just a comment, nothing is parsed
Given [this thing] # Sets up the test
When [other thing] # Action that is part of the test
And
But

Bundler

cd [mwcore]/tests/browser
bundle install
bundle exec cucumber features/create_account.feature:14

Important

export BROWSER=firefox
export MEDIAWIKI_ENVIRONMENT=mw-vagrant-host

Helpful Posts

- pthree.org post

• Datko's book has this same kinda stuff.

Restart bitlbee without restarting Weechat

sudo service bitlbee stop
/disconnect localhost
sudo service bitlbee start
/connect localhost/6667
/msg &bitlbee identify [password]

Setup OTR

First had to install the bitlbee-plugin-otr plugin:

sudo apt-get install bitlbee-plugin-otr

In the &bitlebee window

account list
> @root 0 (gtalk): jabber, thcipriani@gmail.com (connected)
> @root 1 (twitter): twitter, thcipriani (connected)

Will return a list of accounts that are currently setup in bitlbee.

To generate a key for the 0th account—gmail in my case:

otr keygen 0

Hardware

I managed to grab an EasyCap D60 Recording device from Amazon.

This device is supported inside the linux kernel (from version 3.18 forward…maybe?)

Once I plugged in this device, it was working:

lsusb

This bad boy:

I checked out:

ls /dev | grep -i video

And I noticed a new video device video1. Easy.

Capture Software

I used VLC to caputre raw input.

1. Media → Open Caputre Device
2. Video Device Name → /dev/video1
3. Audio Device Name → hw:2,0
4. Play pulldown menu → Convert
5. Dump Raw Input
6. Destination File → /home/tyler/Videos
7. Start
8. Hit play on the VCR
9. Hit the Rec. button in VLC

The auto-named avi file in ~/Videos was FUCKING HUGE.

ls -lh ~/Videos | grep -i avi

Conversion

I found a blog where a person does this. I have a vauge memory about doing this at UpSync, so I'll give it a shot: 2-pass mp4 conversion.

Let's see what happens!

ffmpeg -i ~/Videos/vlc-record-2016-04-22-14h47m57s-Streaming-.avi -c:v libx264 -pix_fmt yuv420p -preset slow -threads 0 -b:v 825k -strict -2 -c:a aac -b:a 96k -pass 1 -f mp4 -y /dev/null

ffmpeg -i ~/Videos/vlc-record-2016-04-22-14h47m57s-Streaming-.avi -c:v libx264 -pix_fmt yuv420p \
  -preset slow -threads 0 -b:v 825k -strict -2 -c:a aac -b:a 96k -pass 2 ~/Videos/out.mp4

The settings above created an mp4 that could be played via x264 on a RaspberryPi 3.

Links

• https://robots.thoughtbot.com/the-magic-behind-configure-make-make-install

configure.ac

• Written in m4sh (m4 + shell)
• Program initialization: AC_INIT macro—needs name, version, maintainer
• Initialize automake: AM_INIT_AUTOMAKE
• Make sure that C-compiler exists: AC_PROG_CC
• Build Makefile from Makefile.in, replaces @PACKAGE_VERSION@-type variables: AC_CONFIG_FILES([Makefile])
• Output the script: AC_OUTPUT

AC_INIT([hello-world], [0.1], [tyler@tylercipriani.com])

# Initialize automake
AM_INIT_AUTOMAKE

# Ensure C-compiler exists
AC_PROG_CC

# Specify what files are to be created
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

Makefile.am

• The ./configure script (created by configure.ac), expects to find Makefile.in
• Makefile.in is long and dumb (just like ./configure), so we make a Makefile.am
• automake generates Makefile.in
• foreign AUTOMAKE_OPTIONS tells that the layout is "non standard"

AUTOMAKE_OPTIONS = foreign
bin_PROGRAMS = hello-world
hello-world_SOURCES = hello-world.c

Put it all together:

• create m4 environment: aclocal
• autoconf does: configure.ac → configure
• automake --add-missing does: Makefile.am → Makefile.in
• autoreconf --install: autoreconf runs autoconf, autoheader, aclocal, automake, libtoolize, and autopoint

Install

Mostly it was pretty easy

• Grabbed the tar from debian
• Followed install instructions from Ikiwiki's install page

tar xvzf ikiwiki_3.20160121.tar.gz
cd ikiwiki_3.20160121
sudo PERL5LIB=`pwd` PERL_MM_USE_DEFAULT=1 perl -MCPAN -e 'CPAN::Shell->install("Bundle::IkiWiki")'
sudo PERL5LIB=`pwd` PERL_MM_USE_DEFAULT=1 perl -MCPAN -e 'CPAN::Shell->install("Bundle::IkiWiki::Extras")'
make
sudo make install

OpenID Setup

Ikiwiki requires an OpenID setup.

You can login to Ikiwiki with OpenID, and I think that's neat!

Since OpenID is somewhat dead, I decided to setup a personal SimpleID.

I put this all on the analytics server.

First I had to create a DNS record for openid.tylercipriani.com so letsencrypt would work.

Then I made a new letsencrypt cert:

/usr/local/src/letsencrypt/letsencrypt-auto certonly --standalone -d openid.tylercipriani.com

Then I grabbed and installed openid

cd /usr/local/src
curl -sLO http://downloads.sourceforge.net/simpleid/simpleid-1.0.1.tar.gz
tar xvzf simpleid-1.0.1.tar.gz
mkdir /srv/www/openid.tylercipriani.com
mv simpleid/{cache,identities,store,www} /srv/www/openid.tylercipriani.com
mv /srv/www/openid.tylercipriani.com/{config.php.dist,config.php}

Edited the config.php file, changed root webserver and the pretty url thing

I also made a virtualserver: openid.tylercipriani.com

Identity file: thcipriani.identity

identity="https://tylercipriani.com/"
password="blah:sha1:salt"
administrator=1
[user_info]
...
[sreg]
...

Blog setup

The things that I didn't understand about Ikiwiki:

1. htmlscrubber removes all your scripts
2. Some changes to the setup file (like git_wrapper updates) require you to run ikiwiki --changesetup [setupfile]
3. I am running a staging wiki on my laptop, a wiki on my webserver, and then pushing the compiled files to s3: WAT‽

Contacts

Install goobook:

sudo pip2 install -U goobook

I ran into some problems in arch, had to upgrade/reinstall a few deps:

(ﾉ^ヮ^)ﾉ*:・ﾟ✧ sudo pip2 install -U pyasn1
(ﾉ^ヮ^)ﾉ*:・ﾟ✧ sudo pip2 install -U cryptography

goobook then needs to authenticate with gmail:

goobook authenticate

Once you go through the oauth song and dance you should be able to run a query

(ﾉ^ヮ^)ﾉ*:・ﾟ✧ goobook query tyler

thcipriani@gmail.com    Tyler Cipriani  other groups: "System Group: Friends"

From there, just need to add a bit of magic to the ~/.muttrc file

set query_command="goobook query %s"
macro index,pager a \
    "<pipe-message>goobook add<return>" "add sender to google contacts"
bind editor <Tab> complete-query

Viewing URLs

Install urlview: ncurses program parses urls out of text.

Create a $HOME/urlview file:

COMMAND xdg-open %s &

Bind \,u in the editor:

macro pager ,u "|urlview<enter>" "call urlview to open links"

Searching Mail

Searching works really well via notmuch

Afer install, setup via

notmuch setup

After setup, it's just a matter of calling

notmuch new

to index the things

Setup New repo

1. init git:

   git init

2. init git annex:

   git annex init local

3. Add S3 Remote named public-s3

   git annex initremote public-s3 type=S3 encryption=none bucket=tyler.zone chunk=0

4. Add file to git annex

   git annex add [big-file]

5. copy current directory to public-s3 remote

   git annex copy --to public-s3

6. remove local copy—will only remove if already in remote—nothing lost

   git annex drop [file]

7. Commit

   git -a -m 'initial commit'

Setup NFS as remote using Rsync over ssh

1. Add Rsync as unencrypted remote

   git annex initremote nas type=rsync rsyncurl=nfs.blazeyandltyler.com:/volume1/homes/tyler/PicturesAnnex encryption=none

2. Add file to nas

   git annex copy --to=nas

Pull down photos

eval (~/.amazonrc)
git annex enableremote public-s3
git annex get [whatever]

Make available to the public (after public s3 setup):

git annex addurl --file [filename] "http://tyler.zone/$(git annex lookupkey [filename])"

List remotes and remote info

git annex enableremote

git annex info [remote-name]
git annex info tylercipriani-raw

Finding info about files

Find a file:

git annex whereis [filename]

Adding a file to http://tyler.zone

eval $(~/.amazonrc)
git annex copy --to=photo-site [file]
git annex addurl --file [file] "http://tyler.zone/$(git annex lookupkey [filename])"

Sharing via Amazon s3

{
  "Version": "2008-10-17",
  "Statement": [
    {
      "Sid": "AllowPublicRead",
      "Effect": "Allow",
      "Principal": {
        "AWS": "*"
      },
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::[bucket-name]/*"
    }
  ]
}

eval (~/.amazonrc)
cd into repo:
cd /home/tyler/Projects/Timelapse

Get your fingerprint:

gpg --list-secret-keys --fingerprint

Get someone elses key

gpg2 --search-keys EMAIL

gpg2 --recv-key KEYID

Sign keys

gpg2 --recv-key KEYID
gpg2 --sign-key KEYID
gpg2 --send-key KEYID

Photos

gpg --edit-key KEYID showphoto

gpg --edit-key KEYID addphoto

Keysigning party etherpad

gpg2 --recv-key KEYID
gpg2 --sign-key KEYID
gpg2 --send-key KEYID

 for k in $(grep pub ksp-wmf-20160108.txt | awk '{print $2}' | awk -F '/' '{print $2}'); do
    echo "Receiving $k"
    gpg2 --recv-key $k
    echo "Signing key $k"
    gpg2 --sign-key $k
    echo "Sending key $k"
    gpg2 --send-key $k
done

SHA256 Checksum: 52F2 CF39   6A54 6D56   7F55 7138   7264 11BA
                    AEE3 F34E   8880 681C   9A67 75D1   3BBC 74DC              [ ]
                    52F2CF39 6A546D56 7F557138 726411BA AEE3F34E 8880681C 9A6775D1 3BBC74DC

                    RIPEMD160 Checksum: BB44 91B6 0A4D 5865 2105    2A4C 19FB 11AD 8BCC C3C3    [ ]
                    BB44 91B6 0A4D 5865 2105  2A4C 19FB 11AD 8BCC C3C3

Mutt problems

Pass problems

gpg: decryption failed: No secret key

pinentry-program /usr/bin/pinentry

For realz Steps!

1. Download Ubuntu 14.04 Live OS and Debian 8.1.0 netinst

2. Copy to a Ubuntu USB Drive:

   • use lsblk/blkid to find USB drive name without number, e.g. /dev/sdb NOT /dev/sdb1
   • dd bs=4M ~/Downloads/ubuntu-14.04.2-desktop-amd64.iso of=/dev/[usbdrive-without-number]

3. Download Non-free firmware

   • Linux Questions Answer
   • firmware-iwlwifi download

4. Extract firmware from deb

   • ar xv firmware-iwlwifi.deb
   • tar xvf data.tar.xz

5. Copy to ext4 formatted sd-card

   • mkfs.ext4 /dev/[sd-card]
   • mount -t ext4 /dev/[sd-card] /mnt/sd-card
   • cp -r lib/firmware/* /mnt/sd-card

6. Boot Ubuntu from usb/change UEFI opts

   • Insert Ubuntu USB drive in Asus, Boot while holding F2
   • Boot → Fastboot [Disabled]
   • Security → Secure Boot Menu → Secure Boot Control [Disabled]
   • Advanced → SATA Configuration → SATA Mode Selection [AHCI]
   • Boot → Boot Option Priorites (hit + until USB drive is at the top)
   • F10 (save and exit)

7. Try Ubuntu without installing

8. Enable network, start terminal (Start → uxterm → xterm -fn 10x20)

9. sudo gparted, delete all partitions on /dev/sda /dev/sdb

10. Create partition table on /dev/sdb:

    • Select /dev/sdb
    • Device → Create Partition Table…

11. Shutdown, remove usb

12. Copy Debian netinst to USB Drive:

    • use lsblk/blkid to find USB drive name without number, e.g. /dev/sdb NOT /dev/sdb1
    • sudo dd bs=4M if=Downloads/debian-8.0.0-amd64-netinst.iso of=[usbdrive-without-number]

13. Detect network hardware

    • Ctrl-Alt F2
    • mkdir /lib/firmware
    • blkid (to list mounts)
    • mount -t ext4 /dev/sdd1 /lib/firmware
    • modprobe ahci
    • Ctrl-Alt F1

14. Partition Disks

    • Manual
      1. sda & sbd delete existing partitions
      2. sda1 256MB EFI System partition
      3. sda2 512MB mountat /boot ext4
      4. sda3 REMAINDER physical volume for raid
      5. sdb1 ALL physical volument for raid
      6. configure software raid, raid0 [x]sda3 [x]sdb1
      7. raid0 disk1 use as physical volume for encryption
      8. configure encrypted volumes [x]/dev/md0
      9. encrypted-disk 1: use as physical volume for lvm
      10. configure lvm volume group
      11. 20 GB / ; 4 GB swap ; remainder /home

15. Post xmonad-install disable GDM login:

    • XMonad Install
    • Disable GDM systemd

For realz Steps!

1. Download Ubuntu 14.04 Live OS and Debian 8.1.0 netinst

2. Copy to a Ubuntu USB Drive:

   • use lsblk/blkid to find USB drive name without number, e.g. /dev/sdb NOT /dev/sdb1
   • dd bs=4M ~/Downloads/ubuntu-14.04.2-desktop-amd64.iso of=/dev/[usbdrive-without-number]

3. Download Non-free firmware

   • Linux Questions Answer
   • firmware-iwlwifi download

4. Extract firmware from deb

   • ar xv firmware-iwlwifi.deb
   • tar xvf data.tar.xz

5. Copy to ext4 formatted sd-card

   • mkfs.ext4 /dev/[sd-card]
   • mount -t ext4 /dev/[sd-card] /mnt/sd-card
   • cp -r lib/firmware/* /mnt/sd-card

6. Boot Ubuntu from usb/change UEFI opts

   • Insert Ubuntu USB drive in Asus, Boot while holding F2
   • Boot → Fastboot [Disabled]
   • Security → Secure Boot Menu → Secure Boot Control [Disabled]
   • Advanced → SATA Configuration → SATA Mode Selection [AHCI]
   • Boot → Boot Option Priorites (hit + until USB drive is at the top)
   • F10 (save and exit)

7. Try Ubuntu without installing

8. Enable network, start terminal (Start → uxterm → xterm -fn 10x20)

9. sudo gparted, delete all partitions on /dev/sda /dev/sdb

10. Create partition table on /dev/sdb:

    • Select /dev/sdb
    • Device → Create Partition Table…

11. Shutdown, remove usb

12. Copy Debian netinst to USB Drive:

    • use lsblk/blkid to find USB drive name without number, e.g. /dev/sdb NOT /dev/sdb1
    • sudo dd bs=4M if=Downloads/debian-8.0.0-amd64-netinst.iso of=[usbdrive-without-number]

13. Detect network hardware

    • Ctrl-Alt F2
    • mkdir /lib/firmware
    • blkid (to list mounts)
    • mount -t ext4 /dev/sdd1 /lib/firmware
    • modprobe ahci
    • Ctrl-Alt F1

14. Partition Disks

    • Manual
      1. sda & sbd delete existing partitions
      2. sda1 256MB EFI System partition
      3. sda2 512MB mountat /boot ext4
      4. sda3 REMAINDER physical volume for raid
      5. sdb1 ALL physical volument for raid
      6. configure software raid, raid0 [x]sda3 [x]sdb1
      7. raid0 disk1 use as physical volume for encryption
      8. configure encrypted volumes [x]/dev/md0
      9. encrypted-disk 1: use as physical volume for lvm
      10. configure lvm volume group
      11. 20 GB / ; 4 GB swap ; remainder /home

15. Post xmonad-install disable GDM login:

    • XMonad Install
    • Disable GDM systemd

Links

• https://robots.thoughtbot.com/the-magic-behind-configure-make-make-install

configure.ac

• Written in m4sh (m4 + shell)
• Program initialization: AC_INIT macro—needs name, version, maintainer
• Initialize automake: AM_INIT_AUTOMAKE
• Make sure that C-compiler exists: AC_PROG_CC
• Build Makefile from Makefile.in, replaces @PACKAGE_VERSION@-type variables: AC_CONFIG_FILES([Makefile])
• Output the script: AC_OUTPUT

AC_INIT([hello-world], [0.1], [tyler@tylercipriani.com])

# Initialize automake
AM_INIT_AUTOMAKE

# Ensure C-compiler exists
AC_PROG_CC

# Specify what files are to be created
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

Makefile.am

• The ./configure script (created by configure.ac), expects to find Makefile.in
• Makefile.in is long and dumb (just like ./configure), so we make a Makefile.am
• automake generates Makefile.in
• foreign AUTOMAKE_OPTIONS tells that the layout is "non standard"

AUTOMAKE_OPTIONS = foreign
bin_PROGRAMS = hello-world
hello-world_SOURCES = hello-world.c

Put it all together:

• create m4 environment: aclocal
• autoconf does: configure.ac → configure
• automake --add-missing does: Makefile.am → Makefile.in
• autoreconf --install: autoreconf runs autoconf, autoheader, aclocal, automake, libtoolize, and autopoint

Install

Mostly it was pretty easy

• Grabbed the tar from debian
• Followed install instructions from Ikiwiki's install page

tar xvzf ikiwiki_3.20160121.tar.gz
cd ikiwiki_3.20160121
sudo PERL5LIB=`pwd` PERL_MM_USE_DEFAULT=1 perl -MCPAN -e 'CPAN::Shell->install("Bundle::IkiWiki")'
sudo PERL5LIB=`pwd` PERL_MM_USE_DEFAULT=1 perl -MCPAN -e 'CPAN::Shell->install("Bundle::IkiWiki::Extras")'
make
sudo make install

OpenID Setup

Ikiwiki requires an OpenID setup.

You can login to Ikiwiki with OpenID, and I think that's neat!

Since OpenID is somewhat dead, I decided to setup a personal SimpleID.

I put this all on the analytics server.

First I had to create a DNS record for openid.tylercipriani.com so letsencrypt would work.

Then I made a new letsencrypt cert:

/usr/local/src/letsencrypt/letsencrypt-auto certonly --standalone -d openid.tylercipriani.com

Then I grabbed and installed openid

cd /usr/local/src
curl -sLO http://downloads.sourceforge.net/simpleid/simpleid-1.0.1.tar.gz
tar xvzf simpleid-1.0.1.tar.gz
mkdir /srv/www/openid.tylercipriani.com
mv simpleid/{cache,identities,store,www} /srv/www/openid.tylercipriani.com
mv /srv/www/openid.tylercipriani.com/{config.php.dist,config.php}

Edited the config.php file, changed root webserver and the pretty url thing

I also made a virtualserver: openid.tylercipriani.com

Identity file: thcipriani.identity

identity="https://tylercipriani.com/"
password="blah:sha1:salt"
administrator=1
[user_info]
...
[sreg]
...

Blog setup

The things that I didn't understand about Ikiwiki:

1. htmlscrubber removes all your scripts
2. Some changes to the setup file (like git_wrapper updates) require you to run ikiwiki --changesetup [setupfile]
3. I am running a staging wiki on my laptop, a wiki on my webserver, and then pushing the compiled files to s3: WAT‽

Contacts

Install goobook:

sudo pip2 install -U goobook

I ran into some problems in arch, had to upgrade/reinstall a few deps:

(ﾉ^ヮ^)ﾉ*:・ﾟ✧ sudo pip2 install -U pyasn1
(ﾉ^ヮ^)ﾉ*:・ﾟ✧ sudo pip2 install -U cryptography

goobook then needs to authenticate with gmail:

goobook authenticate

Once you go through the oauth song and dance you should be able to run a query

(ﾉ^ヮ^)ﾉ*:・ﾟ✧ goobook query tyler

thcipriani@gmail.com    Tyler Cipriani  other groups: "System Group: Friends"

From there, just need to add a bit of magic to the ~/.muttrc file

set query_command="goobook query %s"
macro index,pager a \
    "<pipe-message>goobook add<return>" "add sender to google contacts"
bind editor <Tab> complete-query

Viewing URLs

Install urlview: ncurses program parses urls out of text.

Create a $HOME/urlview file:

COMMAND xdg-open %s &

Bind \,u in the editor:

macro pager ,u "|urlview<enter>" "call urlview to open links"

Searching Mail

Searching works really well via notmuch

Afer install, setup via

notmuch setup

After setup, it's just a matter of calling

notmuch new

to index the things

Helpful Posts

- pthree.org post

• Datko's book has this same kinda stuff.

Restart bitlbee without restarting Weechat

sudo service bitlbee stop
/disconnect localhost
sudo service bitlbee start
/connect localhost/6667
/msg &bitlbee identify [password]

Setup OTR

First had to install the bitlbee-plugin-otr plugin:

sudo apt-get install bitlbee-plugin-otr

In the &bitlebee window

account list
> @root 0 (gtalk): jabber, thcipriani@gmail.com (connected)
> @root 1 (twitter): twitter, thcipriani (connected)

Will return a list of accounts that are currently setup in bitlbee.

To generate a key for the 0th account—gmail in my case:

otr keygen 0

Hardware

I managed to grab an EasyCap D60 Recording device from Amazon.

This device is supported inside the linux kernel (from version 3.18 forward…maybe?)

Once I plugged in this device, it was working:

lsusb

This bad boy:

I checked out:

ls /dev | grep -i video

And I noticed a new video device video1. Easy.

Capture Software

I used VLC to caputre raw input.

1. Media → Open Caputre Device
2. Video Device Name → /dev/video1
3. Audio Device Name → hw:2,0
4. Play pulldown menu → Convert
5. Dump Raw Input
6. Destination File → /home/tyler/Videos
7. Start
8. Hit play on the VCR
9. Hit the Rec. button in VLC

The auto-named avi file in ~/Videos was FUCKING HUGE.

ls -lh ~/Videos | grep -i avi

Conversion

I found a blog where a person does this. I have a vauge memory about doing this at UpSync, so I'll give it a shot: 2-pass mp4 conversion.

Let's see what happens!

ffmpeg -i ~/Videos/vlc-record-2016-04-22-14h47m57s-Streaming-.avi -c:v libx264 -pix_fmt yuv420p -preset slow -threads 0 -b:v 825k -strict -2 -c:a aac -b:a 96k -pass 1 -f mp4 -y /dev/null

ffmpeg -i ~/Videos/vlc-record-2016-04-22-14h47m57s-Streaming-.avi -c:v libx264 -pix_fmt yuv420p \
  -preset slow -threads 0 -b:v 825k -strict -2 -c:a aac -b:a 96k -pass 2 ~/Videos/out.mp4

The settings above created an mp4 that could be played via x264 on a RaspberryPi 3.

Flash eMMC with latest Debian image

1. Download Debian image [whatever].img.xz

   • http://beagleboard.org/latest-images

     unxz bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img.xz

2. Insert microSD card and make sure that it is unmounted

   • lsblk
   • fdisk -l

3. Copy the img to the microSD card

   sudo dd bs=4 if=bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img of=/dev/mmcblk0 conv=fsync

   This step will take a lot of time.

4. Mount the microSD card and make sure it flashes to the beaglebone:

   sudo mount /dev/mmcblk0p1 /mnt/sd-card
   vim /mnt/sd-card/boot/uEnv.txt

   Uncomment the line:

   cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

5. Hookup the USB-to-serial cable

   • Connect Black Wire to Pin 1 (closest to 5v barrel)
   • Connect Green Wire to Pin 4 (2 pins from pin 1)
   • Connect White Wire to Pin 5

6. Connect to USB, check output of dmesg for which /dev/ the serial connection is on

7. Connect to serial connection via screen

   screen /dev/ttyUSB0 115200

8. put sdcard in BBB and power up, hold the S2 button, power up

9. Wait, the status lights will flash in a cylon pattern, you can watch the eMMC flash progress via screen

10. All User LEDs should be solid on completion

More info is available on the BeagleBoneBlack Wiki

Initial setup

ssh -l root 192.168.7.2

#!/usr/bin/env bash
# Debian auto-upgrade script
# https://debian-handbook.info/browse/stable/sect.automatic-upgrades.html

# kill all cached creds
sudo -k

# ask for new creds
sudo -v

export DEBIAN_FRONTEND=noninteractive
sudo apt-get update
yes '' | sudo apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" dist-upgrade

Basic security

Fun Stuff

• Change ssh banner:

  sudo apt-get install figlet
  awk '$1 !~ /default/' /etc/issue.net > ~/issue.net && sudo mv ~/issue.net /etc/issue.net
  sudo sh -c 'figlet BeagleBone >> /etc/issue.net'

• BeagleBone pin-out

  • http://stuffwemade.net/post/beaglebone-pinout

Things to remember

thank god for 1wire temp sensor blog posts:

• http://interactingobjects.com/ds18b20-temperature-sensor-on-a-beaglebone-black-running-ubuntu/

• http://klaus.ede.hih.au.dk/index.php/BBB_and_OneWire

  iwconfig when can't find wlan0 interface (could be wlan1)

Installing Neovim

1. Install Prerequisites

   sudo apt-get -f install libtool libtool-bin autoconf automake cmake g++ pkg-config unzip libmsgpack-dev libuv-dev libluajit-5.1-dev

2. Clone repo

   git clone https://github.com/neovim/neovim.git

3. Make install

   cd neovim
   make
   sudo make install

Setup Neovim

ln -s ~/.vim $XDG_CONFIG_HOME/nvim
ln -s ~/.vimrc $XDG_CONFIG_HOME/nvim/init.vim

Get your fingerprint:

gpg --list-secret-keys --fingerprint

Get someone elses key

gpg2 --search-keys EMAIL

gpg2 --recv-key KEYID

Sign keys

gpg2 --recv-key KEYID
gpg2 --sign-key KEYID
gpg2 --send-key KEYID

Photos

gpg --edit-key KEYID showphoto

gpg --edit-key KEYID addphoto

Keysigning party etherpad

gpg2 --recv-key KEYID
gpg2 --sign-key KEYID
gpg2 --send-key KEYID

 for k in $(grep pub ksp-wmf-20160108.txt | awk '{print $2}' | awk -F '/' '{print $2}'); do
    echo "Receiving $k"
    gpg2 --recv-key $k
    echo "Signing key $k"
    gpg2 --sign-key $k
    echo "Sending key $k"
    gpg2 --send-key $k
done

SHA256 Checksum: 52F2 CF39   6A54 6D56   7F55 7138   7264 11BA
                    AEE3 F34E   8880 681C   9A67 75D1   3BBC 74DC              [ ]
                    52F2CF39 6A546D56 7F557138 726411BA AEE3F34E 8880681C 9A6775D1 3BBC74DC

                    RIPEMD160 Checksum: BB44 91B6 0A4D 5865 2105    2A4C 19FB 11AD 8BCC C3C3    [ ]
                    BB44 91B6 0A4D 5865 2105  2A4C 19FB 11AD 8BCC C3C3

Mutt problems

Pass problems

gpg: decryption failed: No secret key

pinentry-program /usr/bin/pinentry

Flash eMMC with latest Debian image

1. Download Debian image [whatever].img.xz

   • http://beagleboard.org/latest-images

     unxz bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img.xz

2. Insert microSD card and make sure that it is unmounted

   • lsblk
   • fdisk -l

3. Copy the img to the microSD card

   sudo dd bs=4 if=bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img of=/dev/mmcblk0 conv=fsync

   This step will take a lot of time.

4. Mount the microSD card and make sure it flashes to the beaglebone:

   sudo mount /dev/mmcblk0p1 /mnt/sd-card
   vim /mnt/sd-card/boot/uEnv.txt

   Uncomment the line:

   cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

5. Hookup the USB-to-serial cable

   • Connect Black Wire to Pin 1 (closest to 5v barrel)
   • Connect Green Wire to Pin 4 (2 pins from pin 1)
   • Connect White Wire to Pin 5

6. Connect to USB, check output of dmesg for which /dev/ the serial connection is on

7. Connect to serial connection via screen

   screen /dev/ttyUSB0 115200

8. put sdcard in BBB and power up, hold the S2 button, power up

9. Wait, the status lights will flash in a cylon pattern, you can watch the eMMC flash progress via screen

10. All User LEDs should be solid on completion

More info is available on the BeagleBoneBlack Wiki

Initial setup

ssh -l root 192.168.7.2

#!/usr/bin/env bash
# Debian auto-upgrade script
# https://debian-handbook.info/browse/stable/sect.automatic-upgrades.html

# kill all cached creds
sudo -k

# ask for new creds
sudo -v

export DEBIAN_FRONTEND=noninteractive
sudo apt-get update
yes '' | sudo apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" dist-upgrade

Basic security

Fun Stuff

• Change ssh banner:

  sudo apt-get install figlet
  awk '$1 !~ /default/' /etc/issue.net > ~/issue.net && sudo mv ~/issue.net /etc/issue.net
  sudo sh -c 'figlet BeagleBone >> /etc/issue.net'

• BeagleBone pin-out

  • http://stuffwemade.net/post/beaglebone-pinout

Things to remember

thank god for 1wire temp sensor blog posts:

• http://interactingobjects.com/ds18b20-temperature-sensor-on-a-beaglebone-black-running-ubuntu/

• http://klaus.ede.hih.au.dk/index.php/BBB_and_OneWire

  iwconfig when can't find wlan0 interface (could be wlan1)

Installing Neovim

1. Install Prerequisites

   sudo apt-get -f install libtool libtool-bin autoconf automake cmake g++ pkg-config unzip libmsgpack-dev libuv-dev libluajit-5.1-dev

2. Clone repo

   git clone https://github.com/neovim/neovim.git

3. Make install

   cd neovim
   make
   sudo make install

Setup Neovim

ln -s ~/.vim $XDG_CONFIG_HOME/nvim
ln -s ~/.vimrc $XDG_CONFIG_HOME/nvim/init.vim