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Get an audio notification if a new device is attached to your computer

dmesg -t: no timestamp -W: follow new messages -l: log-level notice gawk if the fourth word is "Attached" echo a sentence through espeak
This is sample output - yours may be different.
0

dmesg -tW -l notice | gawk '{ if ($4 == "Attached") { system("echo New device attached | espeak") } }

BigZ · 2020-09-06 08:18:26 272

Lower PowerShell priority

Lower PowerShell priority, so that to launch processes in the background and work normally with other applications Show Sample Output

PS> Get-WmiObject Win32_process -filter 'name = "powershell.exe"' | Foreach-Object { $_.SetPriority(16384) }

pascalvaucheret · 2022-06-16 14:53:28 394

which git tags include this commit?

This will list all tags that match the live* glob and contain commit 18f6f2 Show Sample Output
This is sample output - yours may be different.
```
live-20100121
live-20100215
...
```
0

git tag -l --contains 18f6f2 live*

bucciarati · 2010-04-06 22:28:08 3
Find and delete thunderbird's msf files to make your profile work quickly again.
This is sample output - yours may be different.
0

find ~/.thunderbird/*.default/ -name *.msf -delete

skygreg · 2010-06-08 13:34:16 3
Convert all Microsoft Word files in current directory to HTML.

This requires wvWare, which under Debian is in the wv package. Alternative converters can be used, e.g., jodconverter, which uses OO.O instead (no X server need be running.)
This is sample output - yours may be different.
0

for f in *.doc ; do wvHtml $f ${f%.doc}.html ; done

jasonjgw · 2010-11-18 00:20:54 3
Find out the starting directory of a script

I submitted a command like this without $0 if $BASH_SOURCE is unset. Therefor, it did only work when using ./script, not using 'sh script'. This version handles both, and will set $mydir in a script to the current working directory. It also works on linux, osx and probably bsd.
This is sample output - yours may be different.
0

mydir=$(cd $(dirname ${BASH_SOURCE:-$0});pwd)

xeor · 2011-04-27 16:33:38 4
Backup entire system

Backup your entire system on a tar ball file format.
This is sample output - yours may be different.
0

cd / ; tar -cvpzf backup.tar.gz --exclude=/backup.tar.gz --exclude=/proc --exclude=/lost+found --exclude=/sys --exclude=/mnt --exclude=/media --exclude=/dev /

strzel_a · 2011-07-20 15:44:07 5
Fix MP3 tags encoding (to UTF-8). Batch fixes all MP3s in one directory.

Fixes MP3 tags encoding (to UTF-8). Batch fixes all MP3s in one directory.
This is sample output - yours may be different.
0

find . -iname "*.mp3" -execdir mid3iconv -e <encoding> {} \;

sxiii · 2011-12-14 18:10:27 5
Monitor MySQL threads per user

This shows the number of threads allocated per user. Show Sample Output
This is sample output - yours may be different.
```
redmine 2
foo     3
bar     3
sysusr  36
```
0

mysql -BNe "SELECT user,COUNT(user) AS count FROM processlist GROUP BY user ORDER BY count;" information_schema

anarcat · 2012-03-09 17:25:23 6
Sort files by size

ls -al gives all files, sort +4n sorts by 5th field numerically
This is sample output - yours may be different.
0

ls -al | sort +4n

ankush108 · 2012-06-26 19:20:05 17
Find and remove files older than 365 days
This is sample output - yours may be different.
0

find ./ -type f -mtime +365 -exec rm -f {} \;

szimbaro · 2013-02-27 12:36:35 4
If your disk space Used =100% displayed even after deleting the files generated the below command then Just REBOOT the System .
This is sample output - yours may be different.
0

dd if=/dev/zero of=/fs/to/fill/dummy00 bs=8192 count=$(df --block-size=8192 / | awk 'NR!=1 {print $4-100}')

veenaloke · 2013-04-21 13:57:14 5
Recursively remove all empty directories

It starts in the current working directory. It removes the empty directory and its ancestors (unless the ancestor contains other elements than the empty directory itself). It will print a failure message for every directory that isn't empty. This command handles correctly directory names containing single or double quotes, spaces or newlines. If you do not want only to remove all the ancestors, just use: find . -empty -type d -print0 | xargs -0 rmdir
This is sample output - yours may be different.
0

find . -empty -type d -print0 | xargs -0 rmdir -p

rafar · 2013-07-01 02:44:57 6
Easy IPTables management

These series of commands allows you all at once to make a backup of your current config, edit that config, then saves it as the running config and makes it persistent. I would advise knowing what your doing to the config before running this because if you mess up say the port 22 portion, you may get knocked off the system. ;) Don't say I didn't warn ya!
This is sample output - yours may be different.
0

iptables-save > iptables.current; vi iptables.current; iptables-restore iptables.current; service iptables save

bigc00p · 2013-12-04 18:41:48 9
Remap Nic aliases from PCI location

for redhat systems works sometimes :S tested on dell poweredge r7+ systems
This is sample output - yours may be different.
0

lspci -vv | grep 'Ethernet\|Serial' | awk 'NR == 1{ printf $1 } NR == 2 { print " mac " $7 }' | sed ?e 's/-/:/g' -e 's/:f[ef]:f[ef]//g' -e 's/01:00.0/eth0/g' -e 's/01:00.1/eth1/g' -e 's/01:00.2/eth2/g' -e 's/01:00.3/eth3/g' > /etc/iftab && ifrename

PROJAK_SX · 2014-03-01 20:07:18 6
Simple Bashrc Cron Job Using Aliases For A Simple Interface

Everytime You Run Bash It Will Run And Send The Command To Background In A Loop Forever. This Is Useful In Android To Avoid Getting Discconnected While Using ADB Or Other Services Like SSH By Being Inactive For Long Periods Of Time. In My Case I Get Bash Full Suport Only Through ADB And Also A Decent Python Interpreter Using Python For Android.
This is sample output - yours may be different.
0

alias alive='(while true; do ping -c 4 192.168.1.1 > /dev/null 2>&1 ; sleep 300 ; done)'

DarkXDroid · 2014-06-13 06:13:57 7
Null a file with sudo
This is sample output - yours may be different.
0

sudo tee /path/to/file < /dev/null

Panovski · 2014-10-02 20:08:42 8
Make changes in .bashrc immediately available
This is sample output - yours may be different.
0

source ~/.bashrc

unixmonkey86582 · 2015-01-16 00:38:05 8
pretty print environment variable PATH

Echo $PATH isn't very easy to read. Show Sample Output
This is sample output - yours may be different.
```
/bin
/home/wbg/anaconda/bin
/home/wbg/bin
/sbin
/usr/bin
/usr/local/bin
/usr/local/sbin
/usr/sbin
```
0

echo $PATH | sed 's/:/\n/g' | sort | uniq

wbg · 2015-09-30 05:55:51 13
Get purescript externs

just some jq code... Show Sample Output
This is sample output - yours may be different.
```
{
  "kind": "ValueRef",
  "value": "notEq1"
}
{
  "kind": "TypeInstanceRef",
  "value": "eqBoolean"
}
```
0

cat externs.json | jq ".efExports | .[] | (keys|.[0]) as \$kind | {kind:\$kind,value:(.[\$kind] |.Ident?)}"

wires · 2017-04-01 13:55:53 29
Recursive convert all print statements in py files from python2 to python3 form

Use find . -iname "*.py" -type f -print0 | xargs -0 sed -ne 's/^$[ \t]*$print $.*$$/\1print(\2)/p' to see what would be changed.
This is sample output - yours may be different.
0

find . -iname "*.py" -type f -print0 | xargs -0 sed -i 's/^$[ \t]*$print $.*$$/\1print(\2)/g'

sleepprogger · 2017-05-22 22:39:58 16
Get account info from CLI

Get AWS Account ID of AWS Show Sample Output
This is sample output - yours may be different.
```
123456789012
```
0

aws sts get-caller-identity --output text | awk {'print $1'}

hoon · 2017-11-27 06:20:45 22
run zenity object on local machine for to insert video stream url to play on remote machine

use this command via ssh on remote machine when you want play video stream or path to file
This is sample output - yours may be different.
0

lol=`zenity --entry` && DISPLAY=:0.1 cvlc -f -I ncurses --play-and-exit "$lol"

rusino · 2010-09-12 01:02:53 3
SSH connection with private key and port 222
This is sample output - yours may be different.
0

ssh -i /root/.ssh/username\@hostname -p 222 username@hostname

wallacetan · 2011-09-30 11:23:22 5
commit message generator - whatthecommit.com

If you don't have html2text Show Sample Output
This is sample output - yours may be different.
```
put code that worked where the code that didn't used to be
```
0

curl -s 'http://whatthecommit.com/' | grep '<p>' | cut -c4-

hputman · 2011-11-04 14:37:36 3
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Install pip with Proxy

Installs pip packages defining a proxy

Update a tarball

This will update the tarball, adding files that have changed since the last update. This assumes that the tarball is in the same directory as the files being archived. N.B. This command can't be used on compressed tarballs. N.B. This will add the updated files to the tarball, so that the tarball will have two versions of each file. This will make the tarball larger, but doesn't have any other significant effect.

Clean the /boot directory

On Fedora clean the boot directory; erase older kernel

Print all open regular files sorted by the number of file handles open to each.

This command run fine on my Ubuntu machine, but on Red Hat I had to change the awk command to `awk '{print $10}'`.

Extract title from HTML files

previous version leaves lots of blank lines

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"

ls -hog --> a more compact ls -l

I often deal with long file names and the 'ls -l' command leaves very little room for file names. An alternative is to use the -h -o and -g flags (or together, -hog). * The -h flag produces human-readable file size (e.g. 91K instead of 92728) * The -o suppresses the owner column * The -g suppresses the group column Since I use to alias ll='ls -l', I now do alias ll='ls -hog'

Create a persistent connection to a machine

Create a persistent SSH connection to the host in the background. Combine this with settings in your ~/.ssh/config: Host host ControlPath ~/.ssh/master-%r@%h:%p ControlMaster no All the SSH connections to the machine will then go through the persisten SSH socket. This is very useful if you are using SSH to synchronize files (using rsync/sftp/cvs/svn) on a regular basis because it won't create a new socket each time to open an ssh connection.

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)

Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Undo several commits by committing an inverse patch.

Use this to make a new commit that "softly" reverts a branch to some commit (i.e. squashes the history into an inverse patch). You can review the changes first by doing the diff alone.

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