Commands by max (1)

  • Dumps a compressed svn backup to a file, and emails the files along with any messages as the body of the email

    (svnadmin dump /path/to/repo | gzip --best > /tmp/svn-backup.gz) 2>&1 | mutt -s "SVN backup `date +\%m/\%d/\%Y`" -a /tmp/svn-backup.gz emailaddress
    max · 2010-03-08 05:49:01 0

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Colour part of your prompt red to indicate an error
If the return code from the last command was greater than zero, colour part of your prompt red. The commands give a prompt like this: [user current_directory]$ After an error, the "[user" part is automatically coloured red. Tested using bash on xterm and terminal. Place in your .bashrc or .bash_profile.

Press ctrl+r in a bash shell and type a few letters of a previous command
In the sample output, I pressed ctrl+r and typed the letters las. I can't imagine how much typing this has saved me.

Backup your hard drive with dd
This will create an exact duplicate image of your hard drive that you can then restore by simply reversing the "if" & "of" locations. $ sudo dd if=/media/disk/backup/sda.backup of=/dev/sda Alternatively, you can use an SSH connection to do your backups: $dd if=/dev/sda | ssh dd of=~/backup/sda.backup

Prettify an XML file
Generated XML files often are poorly formatted. Use this command to properly indent and normalize the file in-place.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Play Mediafile in multipart RAR archive on the fly with buffer to seek back and forth
Fire this up in the directory of the RAR achived files to watch any archived movie tv-show or other media without having to unpack it. I also added a cache/buffer to be able to seek back and forth.

(DEBIAN-BASED DISTROS) Find total installed size of packages given a search term
Replace \-dev with whatever you wanna search for

Show sections of a man page.
Uses the formatting of a man page to show an outline of its headers and sub-headers.

Search for packages, ranked by popularity
This will take the packages matching a given `apt-cache search` query (a collection of AND'd words or regexps) and tell you how popular they are. This is particularly nice for those times you have to figure out which solution to use for e.g. a PDF reader or a VNC client. Substitute "" for "" if you want this to use Ubuntu's data instead. Everything else will work perfectly.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

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