Commands tagged bash sorted by votes

Commands tagged bash (821)

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Run a command in every (direct) sub-folder

Change the "run_command" to whatever command you want, and remove the "echo" to run it once you are happy.
This is sample output - yours may be different.
0

for i in */; do echo run_command "${i}"; done

mirams · 2013-11-25 18:33:26 9
Alias for lazy tmux create/reattach

If a session with named the same as your username already exists, then attach to it, otherwise create it
This is sample output - yours may be different.
0

alias ltmux="if tmux has-session -t $USER; then tmux attach -t $USER; else tmux new -s $USER; fi"

bufferoverflow · 2013-12-10 14:46:28 9
count match string lines from file(s)

-c will count the number of times your search matches in the file. Show Sample Output
This is sample output - yours may be different.
```
$ cat file.txt
hello
goodbye
hello
$
$ grep -c "hello" file.txt
2
$
```
0

grep -c "search_string" /path/to/file

meatflag · 2013-12-10 18:13:54 7
Total size in RPM packages

It is not the installed size in files, but the size of RPM packages. Show Sample Output
This is sample output - yours may be different.
```
Total size in packages = 14.5 GB
```
0

rpm -qa --queryformat '%{SIZE}\n' | awk '{sum += $1} END {printf("Total size in packages = %4.1f GB\n", sum/1024**3)}'

skytux · 2013-12-14 20:22:41 10
List all bash shortcuts

Shows all available keyboard bindings in bash. Pretty printing. Show Sample Output
This is sample output - yours may be different.
```
abort                                     "\C-g", "\C-x\C-g", "\e\C-g".
accept-line                               "\C-j", "\C-m".
backward-char                             "\C-b", "\eOD", "\e[D".
backward-delete-char                      "\C-h", "\C-?".
...
```
0

bind -P | grep -v "is not" | sed -e 's/can be found on/:/' | column -s: -t

leni536 · 2013-12-19 12:30:19 8
Count music files in each directory

This lists the number of ogg/mp3/wav/flac files in each subdirectory of the current directory. The output can be sorted by piping it into "sort -n". Show Sample Output
This is sample output - yours may be different.
```
9955 .
82 ./16 Horsepower
17 ./17 Hippies
11 ./Abney Park
44 ./AC DC
10 ./Accept
1 ./Acceptance
9 ./Adiemus
6 ./Bran? Ketern?
10 ./Budapest Gypsy Symphony Orchestra
20 ./Budapester Klezmer Band
35 ./Buena Vista Social Club
12 ./Burlap To Cashmere
```
0

find . -type d -maxdepth 1 -print0 | xargs -0 -I{} sh -c 'find "{}" -type f | grep "ogg\|mp3\|wav\|flac$" | wc -l | tr -d "\n"; echo " {}"'

dbrgn · 2013-12-22 13:40:29 11
Count music files in each directory
This is sample output - yours may be different.
0

for i in */; do echo $(find $i -type f -regextype posix-extended -regex ".*\.(mp3|ogg|wav|flac)" | wc -l) $i ; done

mindfuckup · 2013-12-22 14:33:56 7
Define a quick calculator function

Same functionality without using bash functions. Show Sample Output
This is sample output - yours may be different.
```
$ ? 3+4/2
5
```
0

alias ?=concalc

boynux · 2014-01-02 01:46:44 9
Show total cumulative memory usage of a process that spawns multiple instances of itself

This command will show the sum total of memory used in gigabytes by a program that spawns multiple instances of itself. Replace chrome with whatever program's memory usage you are investigating. This command is rather useless on software that only spawns a single instance of itself. Show Sample Output
This is sample output - yours may be different.
```
6.6
```
0

ps -eo pmem,comm | grep chrome | cut -d " " -f 2 | paste -sd+ | bc

Darkstar · 2014-01-03 15:33:16 11
Show concurrent memory usage for individual instances of an application

Displays memory usage for individual instances of an application that spawns multiple instances of itself. This command also works on single process applications. Show Sample Output
This is sample output - yours may be different.
```
0.6 chrome
0.0 chrome
0.0 chrome-sandbox
0.2 chrome
0.1 chrome
0.6 chrome
```
0

ps -eo pmem,comm | grep application-name

Darkstar · 2014-02-23 13:21:29 6
toggle line wrapping in your terminal

tput rmam will disable line wrapping so that long lines are truncated to width of the terminal ($COLUMNS). tput smam will re-enable wrapping. I've always used tput in bash scripts but I guess it works on the command line too. Doesn't work in all terminals. See http://www.gnu.org/software/termutils/manual/termutils-2.0/html_chapter/tput_1.html
This is sample output - yours may be different.
0

tput rmam

kennyld · 2014-02-26 07:06:37 6
get Windows OS architecture using Cygwin

Using "wmic get * /value" within any Cygwin shell will return lots of Win/Dos newline junk ie "^M$" at the end of found value line, two lines ("$" Unix newline) above, and three below. This makes storing and or evaluating wmic queries as variables a pain. The method i suggest strips the mentioned junk, only returns the value after "OSArchitecture=", and includes only one Unix style newline. Other methods using sed|awk|cut can only handle the output of wmic cleanly when piped or using multiple sed statements. wmic OS get OSArchitecture /value | sed 's/\r//g;s/^M$//;/^$/d;s/.*=//' making wmic OS get OSArchitecture /value | grep -Eo '[^=]*$' a much cleaner and slightly less costly alternative. Show Sample Output
This is sample output - yours may be different.
```
64-bit
```
0

wmic OS get OSArchitecture /value | grep -Eo '[^=]*$'

lowjax · 2014-03-15 02:04:08 13
Get a PostgreSQL servers version

In a multiple PostgreSQL server environment knowing the servers version can be important. Note that psql --version returns just the local psql apps version which may not be what you want. This command dumps the PostgreSQL servers version out to one line. You may need to add more command line options to the psql command for your connection environment. Show Sample Output
This is sample output - yours may be different.
```
PostgreSQL 9.3.3 on x86_64-redhat-linux-gnu, compiled by gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-7), 64-bit
```
0

psql -h <SERVER NAME HERE> -c 'SELECT version();' | grep -v 'version\|---\|row\|^ *$' | sed 's/^\s*//'

pnelsonsr · 2014-03-17 18:36:40 7
Remove .sh file extension for files in current directory

The 'rename' command with the first argument as "'s/\.//'" and the second argument as "" will remove the specified extension from the filenames.
This is sample output - yours may be different.
0

rename 's/\.sh//' ./*

abhikeny · 2014-04-02 16:33:25 6
Check SSH fingerprints

Find all private keys and dump their fingerprints. Show Sample Output
This is sample output - yours may be different.
```
id_rsa: 2048 aa:bb:cc:dd:ee:ff:00:11:22:33:44:55:66:77:88:99  id@base-id (RSA)
other: 2048 00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff  id@OTHER.com (RSA)
```
0

for id in `ls -1 ~/.ssh | grep -v "authorized\|known_hosts\|config\|\."` ; do echo -n "$id: " ; ssh-keygen -l -f .ssh/$id ; done

drockney · 2014-04-16 14:12:20 25
Generate random valid mac addresses

The sed script ensures that the "random" MAC address is unicast (bit 0 of first byte == 0) and local (bit 1 of first byte == 1)
This is sample output - yours may be different.
0

openssl rand -hex 6 | sed 's/$..$/:\1/g; s/^.$.$[0-3]/\12/; s/^.$.$[4-7]/\16/; s/^.$.$[89ab]/\1a/; s/^.$.$[cdef]/\1e/'

phil_m · 2014-04-23 21:43:38 6
Get a PostgreSQL servers version

-t, --tuples-only print rows only Show Sample Output
This is sample output - yours may be different.
```
 PostgreSQL 9.2.5 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8), 64-bit
```
0

psql -h <SERVER NAME HERE> -t -c 'SELECT version();' |head -1

hxre · 2014-04-25 08:26:23 8
Get a PostgreSQL servers version

Without using a pipe. -X ignores the user's .psqlrc configuration file -A sets un-aligned table output mode -t prints rows only (no headers or footers) Show Sample Output
This is sample output - yours may be different.
```
PostgreSQL 9.3.4 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.8.2 20140206 (prerelease), 64-bit
```
0

psql -X -A -t -c "SELECT version();"

malathion · 2014-05-01 18:10:20 7
Extract domain from URl

Extracts domain and subdomain from given URl. See examples. Show Sample Output
This is sample output - yours may be different.
```
http://www.example.com/more/stuff > example.com
https://test.example.com > example.com
http://example.com > example.com
http://www.example.co.uk > example.co.uk
https://www.example.com.au > example.com.au
```
0

MYURL=http://test.example.com ; awk -F/ '{ print $3 }' <<< $MYURL | awk -F. '{ if ( $(NF-1) == "co" || $(NF-1) == "com" ) printf $(NF-2)"."; print $(NF-1)"."$(NF); }'

snafu · 2014-05-26 07:31:40 7
Regular expression search pattern to remove the Datetime and Name when you paste from skype chat into your text editor

Regular expression search pattern to remove the Datetime and Name when you paste from skype chat into your text editor From this Gist: https://gist.github.com/webstandardcss/3967760857d6be470dda
This is sample output - yours may be different.
0

sed -i 's/^.*?].*?:\s//g' skype-chat-log.txt

webstandardcss · 2014-05-26 07:48:36 7
Opens an explorer.exe file browser window for the current working directory or specified dir (Fixed)

What's wrong with this? Show Sample Output
This is sample output - yours may be different.
```
[1] 4076
```
0

explorer . &

rmsh · 2014-06-08 10:16:04 8
More precise BASH debugging
This is sample output - yours may be different.
0

env PS4=' ${BASH_SOURCE:-0$}:${LINENO}(${FUNCNAME[0]}) ' sh -x /etc/profile

brownman · 2014-06-15 12:12:07 9
urldecoding
This is sample output - yours may be different.
0

perl -M URI::Escape -lne 'print uri_unescape($_)'

johnlane · 2014-07-01 10:45:33 7
Get unique basewords from Hashcat pot
This is sample output - yours may be different.
0

cut -f 2 -d ':' oclHashcat.pot | egrep -oi '[a-z]{1,20}' | sort | uniq > base.pot

Creek · 2014-07-14 21:03:22 6
A function to find a file in the pwd downwards

A simple bash function to the find command. I use this much more than find itself. Show Sample Output
This is sample output - yours may be different.
```
$ fn resume
./Documents/2013/My Resume 2014.pdf
```
0

fn() { find . -iname "*$1*" -print; }

suprjami · 2014-07-15 05:30:59 8
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Transfer Entire recursive from one host to another. Only copies files that are newer or do not exist

From opposite host To copy remote to local rsync -aE -e "ssh -pPortnumber" user@hostA:directory target_dir

File rotation without rename command

Rotates log files with "gz"-extension in a directory for 7 days and enumerates the number in file name. i.e.: logfile.1.gz > logfile.2.gz I needed this line due to the limitations on AIX Unix systems which do not ship with the rename command.

Purge configuration files of removed packages on debian based systems

also search with aptitude search '~c'

Fetch all GPG keys that are currently missing in your keyring

For instance, if people have signed your key, this will fetch the signers' keys.

exit without saving history

this exits bash without saving the history. unlike explicitly disabling the history in some way, this works anywhere, and it works if you decide *after* issuing the command you don't want logged, that you don't want it logged ... $$ ( or ${$} ) is the pid of the current bash instance this also works perfectly in shells that don't have $$ if you do something like $ kill -9 `readlink /proc/self`

Find usb device in realtime

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

Writes ID3 tags using the file name as the title.

Assumes that the files are named as such: 01-Filename.mp3 If your files are named differently, change the number of periods in the sed 's/...$.*$/\1' bit to match the numbers of characters you need to cut off the front of the file. Note: This only writes the titles.

Show git branches by date - useful for showing active branches

This fixes a bug found in the other scripts which fail when a branch has the same name as a file or directory in the current directory.

Sort files by date

Show you the list of files of current directory sorted by date youngest to oldest, remove the 'r' if you want it in the otherway.

Reboot without being root

For more, See: https://github.com/noureddin/bash-scripts/blob/master/user_scripts/userpower

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Commands tagged bash (821)

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