Commands by potatoface

Commands by potatoface (10)

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translates acronyms for you

very handy if you are in irc and absolutely don't know what these guys are talking about. this is a netbsd command, if you are lucky it exists in your distro's package database. Show Sample Output
This is sample output - yours may be different.
```
wtf is wtf
WTF: {what,when,where,who,why} the fuck

wtf is iirc
IIRC: if I recall correctly

wtf is rofl
ROFL: rolling on floor laughing

wtf is rtfm
RTFM: read the fine/fucking manual
```
12

wtf is <acronym>

potatoface · 2010-08-24 20:14:53 16
list all files modified in the last 24 hours descending from current directory
This is sample output - yours may be different.
0

find . -type f -mtime -1 \! -type d -exec ls -l {} \;

potatoface · 2010-08-24 20:01:21 6
calculate md5 sums for every file in a directory tree

an alternative
This is sample output - yours may be different.
1

find . -type f -print0 | xargs -0 md5sum

potatoface · 2010-08-24 19:57:24 5
continuously check size of files or directories

very handy if you copy or download a/some file(s) and want to know how big it is at the moment
This is sample output - yours may be different.
1

while true; do du -s <file_or_directory>; sleep <time_interval>; done

potatoface · 2010-08-24 19:55:13 4
delete all leading and trailing whitespace from each line in file
This is sample output - yours may be different.
0

sed 's/^[ \t]*//;s/[ \t]*$//' < <file> > <file>.out; mv <file>.out <file>

potatoface · 2010-08-23 21:38:08 4
delete all leading whitespace from each line in file
This is sample output - yours may be different.
-1

sed 's/^[ \t]*//' < <file> > <file>.out; mv <file>.out <file>

potatoface · 2010-08-23 21:37:14 4
delete all trailing whitespace from each line in file
This is sample output - yours may be different.
0

sed 's/[ \t]*$//' < <file> > <file>.out; mv <file>.out <file>

potatoface · 2010-08-23 21:35:11 4
cat a config file removing all comments and blank lines
This is sample output - yours may be different.
0

grep -vh '^[[:space:]]*$#\|$$' <file>

potatoface · 2010-08-23 20:59:41 7
display a smiling smiley if the command succeeded and a sad smiley if the command failed

you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;) Show Sample Output
This is sample output - yours may be different.
```
ls; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi
linux  linux-2.6.34-gentoo-r1  linux-2.6.34-gentoo-r5  linux-2.6.35-gentoo-r1  linux-2.6.35-gentoo-r2  snort_dynamicsrc
:)

rm; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi
rm: missing operand
Try `rm --help' for more information.
:(
```
4

<commmand>; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi

potatoface · 2010-08-23 20:35:31 14
Search commandlinefu.com from the command line using the API

for me the above command didn't work for more than one argument but this one does
This is sample output - yours may be different.
7

curl "http://www.commandlinefu.com/commands/matching/$(echo "$@" | sed 's/ /-/g')/$(echo -n $@ | base64)/plaintext"

potatoface · 2010-08-23 20:25:13 7

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.

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Converts uppercase chars in a string to lowercase

List the size (in human readable form) of all sub folders from the current location

Tested on MacOS and GNU/Linux. It works in dirs containing files starting with '-'. It runs 'du' only once. It sorts according to size. It treats 1K=1000 (and not 1024)

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Show contents of all git objects in a git repo

This script finds all git objects and `git cat-file`'s their content. This is really just a helper function to play around with the internals of git repositories. See https://git-scm.com/book/en/v2/Git-Internals-Git-Objects of more info.

Numbers guessing game

Felt like I need to win the lottery, and wrote this command so I train and develop my guessing abilities.

Download all manuals RedHat 7 (CentOS/Fedora) with one command in Linux

Colorize grep output

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"

Find all active ip's in a subnet

nmap for windows and other platforms is available on developer's site: http://nmap.org/download.html nmap is robust tool with many options and has various output modes - is the best (imho) tool out there.. from nmap 5.21 man page: -oN/-oX/-oS/-oG : Output scan in normal, XML, s|

Host cpu performance

Measure the cpu performance: In-case if the cpu is thermal throttling then you can find it using this command. Check the first line of the output. Example: Doing md5 for 3s on 16 size blocks: 11406892 md5's in 2.98s ? #(When cpu is not throttling) Doing md5 for 3s on 16 size blocks: 110692 md5's in 2.98s ?? #(When cpu is thermal throttling) Practical use case: Once we had cooling outage in data center which caused thermal throttling in some of the worker nodes. We used this tool to prove that some servers are not performing well because of the cpu thermal throttling.

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