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Merge branch 'master' of https://github.com/kragniz/cheat into kragniz-master
* 'master' of https://github.com/kragniz/cheat: Don't split cheatpath for no reason Remove duplicates from the list of cheatsheets. Change indent level from 2 spaces to 4. Change most of the headers to h1's. Add a non-root section to the installation guide. Don't require the package to be available. Remove old install script Replace support for user's .cheat directories Update readme with setup.py Package with distutils
This commit is contained in:
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import os
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cheat_dir, __init = os.path.split(__file__)
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To search for apt packages:
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apt-cache search "whatever"
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To implement a for loop:
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for file in `ls .`;
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do echo 'file';
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echo 'found';
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done
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To implement a case command:
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case "$1"
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in
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0) echo "zero found";;
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1) echo "one found";;
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2) echo "two found";;
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3) echo "three found";;
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esac
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To resize an image to a fixed width and proportional height:
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convert original-image.jpg -resize 100x converted-image.jpg
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To resize an image to a fixed height and proportional width:
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convert original-image.jpg -resize x100 converted-image.jpg
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To resize an image to a fixed width and height:
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convert original-image.jpg -resize 100x100 converted-image.jpg
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To resize an image and simultaneously change its file type:
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convert original-image.jpg -resize 100x converted-image.png
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To resize all of the images within a directory:
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To implement a for loop:
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for file in `ls original/image/path/`;
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do new_path=${file%.*};
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new_file=`basename $new_path`;
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convert $file -resize 150 conerted/image/path/$new_file.png;
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done
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To cut out the third field of text or stdoutput that is delimited by a #:
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cut -d# -f3
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To release the current IP address:
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sudo dhclient -r
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To obtain a new IP address:
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sudo dhclient
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Running the above in sequence is a common way of refreshing an IP.
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To find files by extension (ex: .jpg):
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find . -iname "*.jpg"
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To find directories:
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find . -type d
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To find files:
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find . -type f
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To find files by octal permission:
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find . -type f -perm 777
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To find files with setuid bit set:
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find . -xdev \( -perm -4000 \) -type f -print0 | xargs -0 ls -l
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To set your identify:
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git config --global user.name "John Doe"
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git config --global user.email johndoe@example.com
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To enable color:
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git config --global color.ui true
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To create a symlink:
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ln -s path/to/the/target/directory name-of-symlink
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To dump a database to a file:
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mysqldump -uusername -ppassword the-database > db.sql
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To dump a database to a .tgz file:
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mysqldump -uusername -ppassword the-database | gzip -9 > db.sql
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To dump all databases to a file:
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mysqldump -uusername -ppassword --all-databases > all-databases.sql
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To view which users/processes are listening to which ports:
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sudo netstat -lnptu
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To send a desktop notification via dbus:
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notify-send -i 'icon-file/name' -a 'application_name' 'summary' 'body of message'
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The -i and -a flags can be omitted if unneeded.
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To replace all occurrences of "day" with "night" and write to stdout:
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sed s/day/night file.txt
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To replace all occurrences of "day" with "night" within file.txt:
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sed s/day/night file.txt > file.txt
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To replace all occurrences of "day" with "night" on stdin:
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echo 'It is daytime' | sed s/day/night/
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To shred a file (5 passes) and verbose output:
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shred -n 5 -v file.txt
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To shred a file (5 passes) and a final overwrite of zeroes:
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shred -n 5 -vz file.txt
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To do the above, and then truncate and rm the file:
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shred -n 5 -vzu file.txt
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To shred a partition:
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shred -n 5 -vz /dev/sda
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Remember that shred may not behave as expected on journaled file systems if file data is being journaled.
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To view which users/processes are listening to which ports:
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sudo sockstat -l
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To split a large text file into smaller files of 1000 lines each:
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split file.txt -l 1000
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To split a large binary file into smaller files of 10M each:
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split file.txt -b 10M
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To consolidate split files into a single file:
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cat x* > file.txt
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To execute a command on a remote server:
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ssh -t user@example.com 'the-remote-command'
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To tunnel an x session over SSH:
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ssh -X user@example.com
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To launch a specific x application over SSH:
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ssh -X -t user@example.com 'chromium-browser'
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For more information, see:
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http://unix.stackexchange.com/q/12755/44856
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To copy a key to a remote host:
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ssh-copy-id username@host
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To copy a key to a remote host on a non-standard port:
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ssh-copy-id username@host -p 2222
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To generate an SSH key:
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ssh-keygen -t rsa
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To generate a 4096-bit SSH key:
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ssh-keygen -t rsa -b 4096
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To copy a key to a remote host:
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ssh-copy-id username@host
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To copy a key to a remote host on a non-standard port:
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ssh-copy-id username@host -p 2222
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To redirect stderr to stdout:
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some-command 2>&1
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To redirect stderr to a file
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some-command 2> errors.txt
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To extract an uncompressed archive:
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tar -xvf /path/to/foo.tar
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To create an uncompressed archive:
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tar -cvf /path/to/foo.tar /path/to/foo/
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To extract a .gz archive:
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tar -xzvf /path/to/foo.tgz
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To create a .gz archive:
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tar -czvf /path/to/foo.tgz /path/to/foo/
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To extract a .bz2 archive:
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tar -xjvf /path/to/foo.tgz
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To create a .bz2 archive:
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tar -cjvf /path/to/foo.tgz /path/to/foo/
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