Commands by darkfader (5)

  • List OSX applications and versions.

    Uses find, plutil and xpath. Note: Some applications don't have proper information. system_profiler might be better to use. It's a bit slow query. Due to command length limit, I removed -name "*.app" and CFBundleName. Show Sample Output


    -1
    find /Applications -type d -maxdepth 1 -exec sh -c 'echo "{}"; (plutil -convert xml1 -o - "{}/Contents/Info.plist" | xpath /dev/stdin "concat(\"v\", /plist/dict/string[preceding-sibling::key[1]=\"CFBundleShortVersionString\"]/node())" 2>/dev/null)' \;
    darkfader · 2013-03-29 14:01:23 5
  • bookmarklet for commandlinefu.com search

    If you add the bookmarklet to your browser's bookmarks with like say, the keyword 'cfu', you can for example type 'cfu hello' in the location bar and the %s gets replaced with 'hello'. The bookmarklet will convert the search text to base64 for use with the commandlinefu website and will take you there. Tested with Firefox. Show Sample Output


    -2
    echo "javascript:location.href='http://www.commandlinefu.com/commands/matching/'+encodeURIComponent('%s')+'/'+btoa('%s')+'/sort-by-votes'"
    darkfader · 2011-03-07 22:01:46 5
  • sshdo, an alternative to sudo

    Run program as root by SSH key forwarding instead of sudoers. Put this alias line in .bashrc or wherever you like. Alias arguments might need extra escaping. You might wonder about security. But you'd block out root login as much as possible of course. In sshd_config you put this: PermitRootLogin no Match Address 127.0.0.1   PermitRootLogin without-password


    -2
    alias sshdo='ssh -q -t root@localhost -- cd $PWD \&\& sudo'
    darkfader · 2010-10-20 22:33:22 9
  • aptbackup restore

    Use when aptbackup will not start or you just want to see what's going on. Show Sample Output


    1
    for p in `grep -v deinstall /var/mobile/Library/Preferences/aptbackup_dpkg-packages.txt | cut --fields=1`; do apt-get -y --force-yes install $p; done
    darkfader · 2010-10-11 22:41:55 8
  • Change SSH RSA passphrase

    Protects your secret identity with a passphrase. OSX 10.6 automatically does key forwarding and can store the passphrase in the keychain. For other OSes, use ssh -A or set ForwardAgent in ssh_config to enable forwarding. Then use ssh-agent/ssh-add. Show Sample Output


    3
    ssh-keygen -f ~/.ssh/id_rsa -p
    darkfader · 2010-07-19 12:53:35 6

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Find the package that installed a command

Search Google from the command line
Adjust Google domain and window width

Find all dot files and directories

Recording the desktop and an application audio source for webcast
You will have to use the sound preferences (record) to choose the audio source and set it to internal.

Human readable directory sizes for current directory, sorted descending

Perl Simple Webserver
First we accept a socket and fork the server. Then we overload the new socket as a code ref. This code ref takes one argument, another code ref, which is used as a callback. The callback is called once for every line read on the socket. The line is put into $_ and the socket itself is passed in to the callback. Our callback is scanning the line in $_ for an HTTP GET request. If one is found it parses the file name into $1. Then we use $1 to create an new IO::All file object... with a twist. If the file is executable("-x"), then we create a piped command as our IO::All object. This somewhat approximates CGI support. Whatever the resulting object is, we direct the contents back at our socket which is in $_[0].

Sum size of files returned from FIND

Kill a broken ssh connection
This is useful for example if you are on ssh in a server and the server goes down without letting you out. This is part of a larget sets of escape sequences provided by ssh. You can find them with ~? Here's the list: ~. - terminate connection (and any multiplexed sessions) ~B - send a BREAK to the remote system ~C - open a command line ~R - request rekey ~V/v - decrease/increase verbosity (LogLevel) ~^Z - suspend ssh ~# - list forwarded connections ~& - background ssh (when waiting for connections to terminate) ~? - this message ~~ - send the escape character by typing it twice (Note that escapes are only recognized immediately after newline.)

Sort files in folders alphabetically
Creates one letter folders in the current directory and moves files with corresponding initial in the folder.

Listing today’s files only

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