Commands by jlaunay

Commands by jlaunay (16)

sorted by

list all available disks and disk partitions
This is sample output - yours may be different.
-3

sed 's/#.*//' /etc/fstab | column -t

jlaunay · 2012-08-17 12:56:31 2
detect partitions
This is sample output - yours may be different.
0

sudo file -bs /dev/sda | sed -e 's/.*partition 1$.*$ code offset.*/partition 1\1/g' -e 's/$.$;/\1\n/g'

jlaunay · 2012-08-17 12:54:05 4
Better git diff, word delimited and colorized

Define a git alias then git dcolor
This is sample output - yours may be different.
3

git config alias.dcolor "diff --color-words"

jlaunay · 2012-08-17 12:07:25 2
Use vim automation to create a colorized html file
This is sample output - yours may be different.
5

file=<filename>;vim ${file} -e -s -c 'runtime! syntax/syntax.vim' -c 'runtime! syntax/2html.vim' -c "w ${file}.html" -c 'q!' -c 'q!' > /dev/null

jlaunay · 2012-08-04 11:46:40 4
dmesg with colored human-readable dates

Use sed to color the output of a human-readable dmesg output
This is sample output - yours may be different.
21

dmesg -T|sed -e 's|$^.*'`date +%Y`']$$.*$|\x1b[0;34m\1\x1b[0m - \2|g'

jlaunay · 2012-07-31 22:21:07 24
Get your current Public IP
This is sample output - yours may be different.
3

dig myip.opendns.com @Resolver1.opendns.com +short

jlaunay · 2012-07-21 01:18:18 2
du and sort to find the biggest directories in defined filesystem

This command give a human readable result without messing up the sorting.
This is sample output - yours may be different.
1

for i in G M K; do du -hx /var/ | grep [0-9]$i | sort -nr -k 1; done | less

jlaunay · 2012-06-26 22:57:17 5
Copies files from a directory to another, overwriting only existing files with same name

As cp is often an alias to cp -i you can use \cp (or cp full path /bin/cp) to use the real cp command instead of its alias
This is sample output - yours may be different.
-1

cp -rf srcdir/* destdir

jlaunay · 2012-06-25 13:01:03 2
exec chmod to subfiles

Using xargs is usually much quicker as it does not have to execute chmod for every file
This is sample output - yours may be different.
-2

find . -type f -print0 | xargs -0 chmod a-x

jlaunay · 2012-06-11 07:28:30 3
Displaying wireless signal on screen in realtime.
This is sample output - yours may be different.
-2

watch -n 1 "awk 'NR==3 {print \"Signal strength = \" \$3 \"00 %\"}''' /proc/net/wireless"

jlaunay · 2012-06-07 11:00:56 7
Automatically find and re-attach to a detached screen session

-RR option is used to resume the first appropriate detached screen session
This is sample output - yours may be different.
2

screen -RR

jlaunay · 2012-03-01 15:27:44 5
what model of computer I'm using?
This is sample output - yours may be different.
0

sudo dmidecode -s system-product-name

jlaunay · 2012-02-08 11:28:46 2
before writing a new script

or add this line to your ~/.vimrc if using vim
This is sample output - yours may be different.
0

:autocmd BufNewFile *.sh,*.bash 0put =\"#!/bin/bash\<nl># -*- coding: UTF8 -*-\<nl>\<nl>\"|$

jlaunay · 2012-02-06 08:28:05 23
Remove comments from files

as suggest in frans coment : '/^#[^!].*/d' -> remove if line begin with # except shebang #!/bin/bash 's/$.*[^!]$#.*[^}]/\1/' -> remove inline comments except shebang and ${variable#}
This is sample output - yours may be different.
0

sed -i -e '/^#[^!].*/d' -e 's/$.*[^!]$#.*[^}]/\1/' <filename>

jlaunay · 2012-01-31 02:45:56 6
Remove a range of lines from a file
This is sample output - yours may be different.
1

sed -i <start>,<end>d <filename>

jlaunay · 2012-01-30 16:11:40 2
copy with progress bar - rsync

a : to keep files permissions --no-whole file : use rsync?s delta-transfer algorithm --inplace : writes the updated data directly to the destination file optionnal -> add --remove-source-files to mv instead of cp
This is sample output - yours may be different.
0

rsync -aP --no-whole-file --inplace

jlaunay · 2012-01-29 18:39:31 4

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Update your OpenDNS network ip

Intended for dynamic ip OpenDNS users, this command will update your OpenDNS network IP. For getting your IP, you can use one of the many one-liners here on commandlinefu. Example: I use this in a script which is run by kppp after it has successfully connected to my ISP: --- #!/bin/bash IP="`curl -s http://checkip.dyndns.org/ | grep -o '[[:digit:].]\+'`" PW="hex-obfuscated-pw-here" if [ "$IP" == "" ] ; then echo 'Not online.' ; exit 1 else wget -q --user=topsecret --password="`echo $PW | xxd -ps -r`" 'https://updates.opendns.com/nic/update?hostname=myhostname&myip='"$IP" -O - /etc/init.d/ntp-client restart & fi --- PS: DynDNS should use a similar method, if you know the URL, please post a comment. (Something with members.dyndns.org, if I recall correctly)

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Factory reset your harddrive. (BE CAREFUL!)

Get a range of SVN revisions from svn diff and tar gz them

Handy when you need to create a list of files to be updated when subversion is not available on the remote host. You can take this tar file, and upload and extract it where you need it. Replace M and N with the revisions specific to yours. Make sure you do this from an updated (svn up) working directory.

show the real times iso of epochs for a given column

When you have one of those (log)files that only has epoch for time (since no one will ever look at them as a date) this is a way to get the human readable date/time and do further inspection. Mostly perl-fu :-/

Dump audio from video without re-encoding.

This removes the video and subsequent file size and directly copies the audio.

Display which distro is installed

Works on nearly all linux distros

Recursively remove all subversion folders

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

a short counter

Maybe you know shorter ?

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by jlaunay