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Which files/dirs waste my disk space
This is sample output - yours may be different.
0

du -h / | grep -w "[0-9]*G"

pashutinsky · 2011-07-23 19:02:11 3
edit a executable script

vie myscript will find where myscript is, and then use vi to edit that file. Not much trick, but saves typing if you use it a lot.
This is sample output - yours may be different.
0

vie(){vi $(which $1)}

lpb612 · 2011-10-03 15:07:19 7
Execute git submodule update in parallel with xargs
This is sample output - yours may be different.
0

git submodule status | awk '{print $2}' | xargs -P5 -n1 git submodule update --init

lox · 2012-06-27 19:26:56 3
Java app with dynamic classpath

Lauching an app including jars in an adjacent lib folder to its classpath
This is sample output - yours may be different.
0

java -jar app.jar -cp $(echo lib/*.jar | tr ' ' ':')

xymor · 2012-10-29 12:51:46 16

Simple calendar from google spanning the width of the terminal

Using the gcalcli interface to google calendar, print the calendar for the next 2 weeks according to the width of the terminal being used. * Remove "--mon" to start week on sunday, * Change 2 for more or less weeks gcalcli --mon --width $((COLUMNS/8)) calm for whole month Show Sample Output

This is sample output - yours may be different.

+------------+------------+------------+------------+------------+------------+------------+
|Monday      |Tuesday     |Wednesday   |Thursday    |Friday      |Saturday    |Sunday      |
+------------+------------+------------+------------+------------+------------+------------+
|01 Jul      |02 Jul      |03 Jul      |04 Jul **   |05 Jul      |06 Jul      |07 Jul      |
|            |            |            |            |            |            |            |
|10:00am     |James       |            |            |            |Tom's       |1:00pm      |
|Hair apt    |birthday    |            |            |            |birthday    |German      |
|            |            |            |            |            |            |Grand Prix  |
|            |6:30pm BBQ  |            |            |            |            |            |
|            |at Toby's   |            |            |            |            |            |
|            |house       |            |            |            |1:00pm      |            |
|            |            |            |            |            |Qualifying  |            |
|            |            |            |            |            |Session     |            |
|            |            |            |            |            |(German     |            |
|            |            |            |            |            |Grand Prix) |            |
+------------+------------+------------+------------+------------+------------+------------+
|08 Jul      |09 Jul      |10 Jul      |11 Jul      |12 Jul      |13 Jul      |14 Jul      |
|            |            |            |            |            |            |            |
|Degree      |Michael     |Samantha    |Alice       |            |Sara &      |Zoe         |
|Congregation|birthday    |birthday    |birthday    |            |Scott       |birthday    |
|            |            |            |            |            |            |            |
|3:45pm      |            |            |            |            |            |            |
|Degree      |            |            |            |            |            |            |
|Congregation|            |            |            |            |            |            |
|Reception   |            |            |            |            |            |            |
|            |            |            |            |            |            |            |
+------------+------------+------------+------------+------------+------------+------------+

gcalcli --mon --width $((COLUMNS/8)) calw 2

jaw42 · 2013-07-04 12:28:51 40

Show the network stats for a given day

Choose the /var/log/sa/saXX log based on what day you want to view. You can use ifconfig to find the name of the interface. You can use the -s flag to specify a certain time period, e.g. -s 12:00:00 -e 14:00:00 Show Sample Output

sar -n DEV -f /var/log/sa/sa05 |awk '{if ($3 == "IFACE" || $3 == "eth0" || $2 == "eth0") {print}}'

jmorganwalker · 2014-03-06 21:32:54 11

Search google.com on your terminal

Mac OSX friendly version of google function Show Sample Output
This is sample output - yours may be different.
```
http://www.bbc.co.uk/schoolradio/subjects/earlylearning/nurserysongs/P-T/row_row_row_your_boat
http://www.bbc.co.uk/schoolradio/subjects/earlylearning/nurserysongs/P-T/row_row_row_your_boat
http://www.wordsforlife.org.uk/songs/row-your-boat
http://supersimplelearning.com/other-songs/row-row-row-your-boat/
http://wiki.kcls.org/index.php/Row,_Row,_Row_Your_Boat
http://bussongs.com/songs/row-row-row-your-boat.php
```
0

function google { Q="$@";GOOG_URL='https://www.google.com/search?tbs=li:1&q=';AGENT="Mozilla/4.0";stream=$(curl -A "$AGENT" -skLm 10 "${GOOG_URL}${Q//\ /+}");echo "$stream" | grep -o "href=\"/url[^\&]*&" | sed 's/href=".url.q=$[^\&]*$.*/\1/';}

davethomas11 · 2014-06-18 17:20:41 6
Basic search for Quassel PostgreSQL database

Replace the credentials to psql if necessary, and the my-query part with your query. Show Sample Output
This is sample output - yours may be different.
```
alias quassel-grep='psql -U quassel quassel -c "SELECT message FROM backlog ORDER BY time DESC LIMIT 1000;" | grep'

# Get messages directed at me
quassel-grep -E Tatsh[,\:]
```
0

psql -U quassel quassel -c "SELECT message FROM backlog ORDER BY time DESC LIMIT 1000;" | grep my-query

Tatsh · 2014-10-12 19:53:06 7
Start Mandala Integration
This is sample output - yours may be different.
0

nohup StartMand.sh -e -b -d mandala.cfg GET_FILES SALES_TRX AGG_TRX &

slyfer · 2015-05-19 11:25:43 9
create 7 variables using output of date command

minimal oneliner to keep track of time Show Sample Output
This is sample output - yours may be different.
```
echo $year $month $day $hour $minutes $seconds $epoch
2015 11 10 23 24 21 1447226661
```
0

read year month day hour minutes seconds epoch _ < <(date '+%Y %m %d %H %M %S %s')

snorf · 2015-11-11 07:27:37 9
Recursive script to find all epubs in the current dir and subs, then convert to mobi using calibre's ebook-convert utility

If you want to change it to find other ebook format change the find extension and the output extensions for whatever that is.
This is sample output - yours may be different.
0

$find . -name '*.mobi' -exec ebook-convert {} {}.epub \;

vfdurder · 2015-12-29 17:55:17 10
Use vi style for edit command line.

after this command, only needs press ESC to edit command line.
This is sample output - yours may be different.
0

set -o vi

Wallebot · 2017-02-27 19:04:33 22
Reclaim standard in from the tty for a script that is in a pipeline

Tests to see if stdin (0) is NOT a terminal. Tests to see if stdout (1) IS a terminal. Copies stdout (opened for write) to stdin (open for read). Show Sample Output
This is sample output - yours may be different.
```
# THIS IS A BASIC DEMO SCRIPT
$ cat ttytest.sh 
#!/bin/bash

while read -t 0.05 ; do
        echo -n . 
done ; echo
read -p "Hello? " R1
echo "${R1:-No reply}"
[ ! -t 0 ] && [ -t 1 ] && exec 0<&1
read -p "Hello?? " R2
echo "${R2:-No reply}"


# RUN IT WITHOUT PIPING
$ bash ttytest.sh 

Hello? hi
hi
Hello?? hi again
hi again


# RUN IT WITH PIPING
$ date | bash ttytest.sh 
.
No reply
Hello?? Hi 
Hi
```
0

[ ! -t 0 ] && [ -t 1 ] && exec 0<&1

pdxdoughnut · 2017-04-12 00:10:27 18
grep multiple value matches that matches all togetger one the same value(concurrency) also
This is sample output - yours may be different.
0

grep '^$default\|smtp\|relay$[^ ]*concurrency[^ ]*'

aysadk · 2017-06-04 15:26:35 17
Get the current epoch in base32
This is sample output - yours may be different.
0

obase=16; echo "$(date +%s)" | bc | xxd -r -p | base32

malathion · 2017-06-26 16:58:38 22
nc check udp port
This is sample output - yours may be different.
0

nc -vz -u 8.8.8.8 53

aysadk · 2017-08-16 19:57:42 17
Replace lines in files with only spaces/tabs with simple empty line (within current directory - recursive)
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec sed -i 's/^[[:blank:]]\+$//g' {} \;

swarzynski · 2020-09-15 09:07:08 145
Delete posts from MyBB Board as User

As a user, deletes all your posts from a MyBB board (provided you have the search page listings of all your posts saved into the same directory this command is run from). Full command: for i in *; do cat $i | grep pid | sed -e 's/;/\ /g' -e 's/#/\ /g' -e 's/pid=/\ /g' | awk -F ' ' '{print $2}' >> posts.txt; done; for c in `cat posts.txt`; do curl --cookie name= --data-urlencode name=my_post_key=\&delete=1\&submit=Delete+Now\&action=deletepost\&pid=$c --user-agent Firefox\ 3.5 --url http://url/editpost.php?my_post_key=\&delete=1\&submit=Delete+Now\&action=deletepost\&pid=$c; sleep 2s; done; echo
This is sample output - yours may be different.
0

curl --cookie name=<cookie_value> --data-urlencode name=my_post_key=<post_key>\&delete=1\&submit=Delete+Now\&action=deletepost\&pid=$c --user-agent Firefox\ 3.5 --url http://url/editpost.php?my_post_key=<post_key>\&delete=1\&submit=Delete+Now\&action=dele

mrlockfs · 2010-07-14 01:50:48 5
Export usernames and passwords from sslstrip log
This is sample output - yours may be different.
0

grep -i -f password_tokens sslstrip.log | awk ' BEGIN { RS="&" } { print $1 }' | grep -i -f tokens_file

anhpht · 2010-12-18 15:42:00 4
Wait the end of prog1 and launch prog2
This is sample output - yours may be different.
0

while pkill -0 prog1; do sleep 10; done; prog2

daa · 2011-02-12 02:53:53 5
dd with progress bar and remaining time displayed
This is sample output - yours may be different.
0

SIZE=`fdisk -s /dev/sdx`; dd if=/dev/sdx bs=1M | pv -s "$SIZE"k > hdd.img

dash · 2011-06-12 20:00:26 3
Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

Creates the .ssh directory on the remote host with proper permissions, if it doesnt exist. Appends your public key to authorized_keys, and verifies it has proper permissions. (if it didnt exist it may have been created with undesireable permissions). *Korn shell syntax, may or may not work with bash
This is sample output - yours may be different.
0

ssh <user>@<host> 'mkdir -m 700 ~/.ssh; echo ' $(< ~/.ssh/id_rsa.pub) ' >> ~/.ssh/authorized_keys ; chmod 600 ~/.ssh/authorized_keys'

Halki · 2011-10-03 15:59:43 3

Embed .torrent in a .jpg file

exiftool can also extract the 'comment' into a file :) Show Sample Output

exiftool '-comment<=ubuntu-11.10-alternate-i386.iso.torrent' hello.jpg

dp3XTg · 2012-03-12 04:42:15 7

List all symbolic links in current directory

Just added maxdepth
This is sample output - yours may be different.
0

find . -maxdepth 1 -type l

Fidelix · 2012-12-30 20:49:28 4
Revoke an existing user's group memberships and add another user to those same groups,

Assuming a convention looking group file, this command will eject oldspiderman from the leagueofsuperfriends group and add newspiderman: oldspiderman:x:551: aquaman:x:552: superman:x:553: newspiderman:x:554: leagueofsuperfriends:x:1000:superman,oldspiderman,superman,aquaman
This is sample output - yours may be different.
0

sed -i.awkbak "s/$[:,]$oldspiderman/\1newspiderman/" /etc/group

iPaulo · 2013-03-01 23:48:20 4
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Multiple variable assignments from command output in BASH

It's quite easy to capture the output of a command and assign it in a shell's variable: $ day=$(date +%d) $ month=$(date +%m) But, what if we want to perform the same task with just one program invocation? Here comes the power of eval! date(1) outputs a string like "day=29; month=07; year=11" (notice the semicolons I added on purpose at date's custom output) which is a legal shell line. This like is then parsed and executed by the shell once again with the help of eval. Just setting 3 variables! Inspired by LinuxJournal's column "Dave Taylor's Work the Shell".

Quick access to the ascii table.

automount samba shares as devices in /mnt/

the middle command between the ; and ; is the vi commands that insert that line into the last line of the file, the esc with the carets is literally hitting the escape key, you have to have the smbfs package installed to do it, I use it to access my iTunes music on my mac from my linux PC's with amarok so I can play the music anywhere in the house. among other things, it allows you to access the files on that share from your computer anytime you're on that network.

Replace spaces in filenames with underscores

Encode png's into blu-ray format

This command takes a set of images (from a render, for example), and converts them into a format conforming to the Blu-ray spec, or at least the version on the Wikipedia page.

Hide or show Desktop Icons on MacOS

Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work

gh or "grep history" - define a function gh combining history and grep to save typing

By defining a function "gh" as shown here, it saves me typing "history | grep" every time I need to search my shell history because now I only have to type "gh". A nifty time saver :-) You can also add the "gh" function definition to your .bashrc so it is defined each time you login. (updated 2015_01_29: changed from hg to gh to avoid clash with that other hg command. mnemonic: gh = grep history)

Display disk partition sizes

Use lsbk (list block) and jq (to manipulate a JSON on the command line) to display partition information:

command line fu roulette

retrieves the html from a random command line fu page, then finds commands on the page and prints them alternatively, pipe to bash (add "| bash" to the end) to execute the command (very risky) edit: had to adjust to properly display the portion that replaces HTML characters (e.g. " -> ")

List all installed PERL modules by CPAN

This command will give you the detailed information about the installed perl modules i.e. installed path, Link type, version, files etc.

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