Commands by Dentorman

Commands by Dentorman (5)

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Loop over the days of a month, in $YYYY$MM$DD format
This is sample output - yours may be different.
0

YYYY=2014; MM=02; for DD in $(cal $MM $YYYY | grep "^ *[0-9]"); do [ ${#DD} = 1 ] && DD=0$DD; echo $YYYY$MM$DD; done

Dentorman · 2015-11-20 09:37:14 0
Replace + Find
This is sample output - yours may be different.
0

find <mydir> -type f -exec rename 's/<string1>/<string2>/g' {} \;

Dentorman · 2015-11-20 04:50:27 8
get ip of all running docker containers
This is sample output - yours may be different.
0

docker inspect --format "{{ .NetworkSettings.IPAddress }}" $(docker ps -q)

Dentorman · 2015-11-20 04:49:18 0
attach to bash shell in the last container you started
This is sample output - yours may be different.
0

dockexecl() { docker exec -i -t $(docker ps -l -q) bash ;}

Dentorman · 2015-11-20 04:48:12 0
Days left before password expires
This is sample output - yours may be different.
0

let NOW=`date +%s`/99516 ; PASS_LAST_CHANGE=`grep $USER /etc/shadow | cut -d: -f3` ; PASS_LIFE=`grep $USER /etc/shadow | cut -d: -f5`; DAYS_LEFT=$(( PASS_LAST_CHANGE + PASS_LIFE - NOW)) ; echo $DAYS_LEFT

Dentorman · 2015-11-20 04:45:44 0

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Change every instance of OLD to NEW in file FILE

Very quick way to change a word in a file. I use it all the time to change variable names in my PHP scripts (sed -i 's/$oldvar/$newvar/g' index.php)

Clear current session history (bash)

Use nroff to view the man pages

Using nroff , it is possible to view the otherwise garbled man page with col command.

pretend to be busy in office to enjoy a cup of coffee

combination of several of the above

Fetch the current human population of Earth

Avoids ssh timeouts by sending a keep alive message to the server every 60 seconds

ssh_config is the system-wide configuration file for ssh. For per-user configuration, which allows for different settings for each host: $echo 'ServerAliveInterval 60' >> ~/.ssh/ssh_config On OSX: $echo 'ServerAliveInterval 60' >> ~/.ssh/config or $echo 'ServerAliveInterval 60' >> ~/etc/ssh_config

Find Duplicate Files (based on MD5 hash) -- For Mac OS X

This works on Mac OS X using the `md5` command instead of `md5sum`, which works similarly, but has a different output format. Note that this only prints the name of the duplicates, not the original file. This is handy because you can add `| xargs rm` to the end of the command to delete all the duplicates while leaving the original.

gzip compression with progress bar and remaining time displayed

Extracting a range of pages from a PDF, using GhostScript

In this example we extract pages 14-17

diff color words

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