Commands tagged purge sorted by votes

Commands tagged purge (4)

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purge installed but unused linux headers, image, or modules

will purge: only installed apps: /^ii/!d avoiding current kernel stuff: /'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d using app names: s/^[^ ]* [^ ]* $[^ ]*$.*/\1/ avoiding stuff without a version number: /[0-9]/!d
This is sample output - yours may be different.
7

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d;s/^[^ ]* [^ ]* $[^ ]*$.*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

plasticdoc · 2009-06-19 10:11:00 0
Remove all old kernels

http://askubuntu.com/questions/89710/how-do-i-free-up-more-space-in-boot
This is sample output - yours may be different.
2

sudo apt-get purge $(dpkg -l linux-{image,headers}-"[0-9]*" | awk '/ii/{print $2}' | grep -ve "$(uname -r | sed -r 's/-[a-z]+//')")

funkjedi · 2015-03-15 15:57:19 1
dpkg: purge all packages matching some name

Recently in Debian Wheezy the dpkg command refuses to work with wildcards, so this is the one-liner alternative.
This is sample output - yours may be different.
0

sudo dpkg -P $(sudo dpkg -l yourPkgName* | awk '$2 ~ /yourPkgName.*/' | awk '$1 ~ /.i/' | awk '{print $2}')

woohoo · 2014-08-02 18:14:02 1
dpkg: purge all packages matching some name

Recently in Debian Wheezy the dpkg command refuses to work with wildcards, so this is the one-liner alternative. (alternative to #13614)
This is sample output - yours may be different.
0

sudo dpkg -P $(dpkg -l yourPkgName* | awk '$2 ~ /yourPkgName.*/ && $1 ~ /.i/ {print $2}')

wejn · 2014-08-06 22:40:32 0

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Determine an image's dimensions

Simple use of ImageMagick identify function.

Unmount all CIFS drives

list files recursively by size

Run a command when a file is changed

Display the end of a logfile as new lines are added to the end

Calculate the mean or average of a single column of numbers in a text file

single-column-numbers.txt is a text file with 22658 rows (numbers) in a single column. Each number can range from 0 to 134298679.533591 and the dot is for the decimals. This is done with perl because awk can't sum such high numbers.

Cut out a piece of film from a file. Choose an arbitrary length and starting time.

With: -vcodec, you choose what video codec the new file should be encoded with. Run ffmpeg -formats E to list all available video and audio encoders and file formats. copy, you choose the video encoder that just copies the file. -acodec, you choose what audio codec the new file should be encoded with. copy, you choose the audio encoder that just copies the file. -i originalfile, you provide the filename of the original file to ffmpeg -ss 00:01:30, you choose the starting time on the original file in this case 1 min and 30 seconds into the film -t 0:0:20, you choose the length of the new film newfile, you choose the name of the file created. Here is more information of how to use ffmpeg: http://www.ffmpeg.org/ffmpeg-doc.html

Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)

When I go to change a configuration file I always like to make a backup first. You can use "cp -p" to preserve the modification time, but it gets confusing to have file.prev, file.prev2, etc. So I like to add a YYMMDD suffix that shows when the file was last changed. "stat -c %Y" gives you the modification time in epoch seconds, then "date -d @" converts that to whatever format you specify in your "+format" string.

Create new user with home dir and given password

The crypt function takes a password, key, as a string, and a salt character array which is described below, and returns a printable ASCII string which starts with another salt. It is believed that, given the output of the function, the best way to find a key that will produce that output is to guess values of key until the original value of key is found. from http://en.wikipedia.org/wiki/Crypt_(Unix)

List detailed information about a ZIP archive

list zipfile info in long Unix ``ls -l'' format.

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Commands tagged purge (4)

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