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Change Windows line endings to Unix version

https://www.howtogeek.com/771399/how-to-use-the-find-command-in-linux/
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec egrep -l $'\r'\$ {} \; | xargs dos2unix

swarzynski · 2022-08-02 09:28:38 1122
rsync over ssh
This is sample output - yours may be different.
0

rsync -avz -e ssh username@hostname:/path/to/remote/dir/ /path/to/local/dir/

int9h · 2009-02-18 22:02:38 5
Creating sequence of number with text

Nice command to create a list, you can create too with for command, but this is so faster. Show Sample Output
This is sample output - yours may be different.
```
jeju:[xxxx] > seq 10 |xargs -n1 echo Printing line
Printing line 1
Printing line 2
Printing line 3
Printing line 4
Printing line 5
Printing line 6
Printing line 7
Printing line 8
Printing line 9
Printing line 10
jeju:[xxxx] >
```
0

seq 10 |xargs -n1 echo Printing line

Waldirio · 2009-10-15 11:05:35 7
Start the x11vnc server

This will start the x11vnc server, scale it at 6/7, will use the vncpass file to authenticate and wont shut down as soon as a client disconnects
This is sample output - yours may be different.
0

x11vnc -display :0 -scale 6/7 -rfbauth vncpass -forever

JulijanAndjelic · 2009-11-12 21:32:45 3
Send a local file via email

on this way we can define the body too
This is sample output - yours may be different.
0

{ echo -e "$body"; uuencode "$outfile" "$outfile"; } | mail -s "$subject" "$destaddr" ;

glaudiston · 2009-12-10 18:08:59 4
Create a series of incrementing numbers in vim

given lines of the form 123|XXXX|1000 ... 123|XXXX|1011 each 'XXXX' will be replaced with a serial number between 0001 and 0004. Show Sample Output
This is sample output - yours may be different.
```
123|XXXX|1000
123|XXXX|1001
123|XXXX|1010
123|XXXX|1011
---
123|0001|1000
123|0002|1001
123|0003|1010
123|0004|1011
```
0

:.,$!perl -pne 'for $i ("0001".."0004"){ s/XXXX/$i/ if($i == $.) }'

bartonski · 2010-02-11 03:56:26 8
Query well known ports list

Just use your system preinstalled file Show Sample Output
This is sample output - yours may be different.
```
[root#server][~]> portnum 25
smtp            25/tcp          mail
smtp            25/udp          mail
```
0

portnum() { egrep "[[:space:]]$*/" /etc/services; }

unixmonkey26187 · 2011-10-07 16:38:29 3
change file permissions whithout changing directory permissions recursive
This is sample output - yours may be different.
0

sudo find foldername -type f -exec chmod 644 {} ";"

megger · 2012-03-20 21:25:10 3
Displays all available firmware you can get (non-free) in a Debian system
This is sample output - yours may be different.
0

apt-file --package-only search /lib/firmware

gnugr · 2012-09-04 15:14:46 6
Useless fun

Something I pulled off 4chan, it plays a tune.
This is sample output - yours may be different.
0

echo "main(i){for(i=0;;i++)putchar(((i*(i>>8|i>>9)&46&i >>8))^(i&i>>13|i>>6));}" | gcc -x c - && ./a.out | aplay

r0nd0n · 2013-01-09 21:48:23 6
get gzipped logs from webserver to local machine
This is sample output - yours may be different.
0

ssh user@remote "tar cfp - /path/to/log/* | gzip" > local.tar.gz

vaaclav · 2013-04-30 09:18:18 6
Poor man's

I sometimes have use an usb stick to distribute files to several standalone "internet" pc's. I don't trust these machines period. The sticks I have do not have a write protection. So as a added security measure I fill the unused space on the (small) usb stick with a file with randomly generated bits. Any malware that tries to write to this stick will find no space on it. Tested on slackware 14 Note: you may need root access to write to the device. This depends on your mount options. Show Sample Output
This is sample output - yours may be different.
```
set +e +u; dd if=/dev/urandom of="/media/usb1/$$";sync;sync
dd: writing to ?/mnt/hd/2967?: No space left on device
32617+0 records in
32616+0 records out
16699392 bytes (17 MB) copied, 1.436 s, 11.6 MB/s
```
0

set +e +u; dd if=/dev/urandom of="/media/usb1/$$";sync;sync

warkruid · 2013-12-22 14:35:53 21
Serve current directory tree at http://$HOSTNAME:8000/
This is sample output - yours may be different.
0

ruby -run -e httpd . -p 8000

koter · 2014-03-19 16:34:06 8
Grab all JIRA ticket numbers (e.g. ABC-123) mentioned in commits added in feature branch off of master

To get the list of tickets in a comma-separated list, pipe the above into: sort | uniq | perl -pe 's/\n/, /' | sed 's/, $//' Show Sample Output
This is sample output - yours may be different.
```
ABC-123
ABC-124
ABC-145
```
0

git log master...feature-a | grep -o -E '\b([A-Z]+)-[0-9]+\b' | sort | uniq

westonruter · 2014-07-07 18:51:01 6
optimize all png images
This is sample output - yours may be different.
0

find . -name *.png | xargs optipng -nc -nb -o7 -full

homoludens · 2014-10-29 10:17:31 9
Get non-localhost IPs from all Internet interfaces
This is sample output - yours may be different.
0

ifconfig -a | grep inet | awk '{print $2}' | cut -d ":" -f 2 | grep -v 127.0.0.1

Dairenn · 2015-02-09 19:19:20 8
Create a new File without I/O

Create a new file, without checking the existence, without I/O; environment test: Linux Bash
This is sample output - yours may be different.
0

>> "file_name";

Izhaq_Melo · 2015-06-03 03:03:57 9
Unzip all zip files in a directory into a newly created directory based on zip file name

For some reason some people do not place files into folders before archiving. This fixes the mess by creating new directories per zip file in directory to unzip to. Show Sample Output
This is sample output - yours may be different.
```
Archive: ABC.zip
extracting: ABC/1
extracting: ABC/2
Archive: DEF.zip
extracting: DEF/1
extracting: DEF/2
```
0

for f in *.zip; do unzip -d "${f%*.zip}" "$f"; done

osu · 2017-07-26 22:26:22 16
Visual system load display

It takes the first value of /prov/loadavg to print that many stars followed by the value. Show Sample Output
This is sample output - yours may be different.
```
******************** 20.98
********************* 21.30
******************* 19.92
**************** 16.85
*************** 15.50
************** 14.90
```
0

while [ true ]; do cat /proc/loadavg | perl -ne 'm/(^[^ ]+)/; $L = $1; print "*" x $L; print " $L\n";' ; sleep 6; done

t3o · 2017-10-13 06:47:06 22
search into contents of python module

srchpymod for e.g. srchpymod cairo Surface ['ImageSurface', 'PDFSurface', 'PSSurface', 'SVGSurface', 'Surface', 'SurfacePattern', 'XlibSurface'] Show Sample Output
This is sample output - yours may be different.
```
Matched symbols in the python module.
```
0

srchpymod() { python -c "import $1; print filter(lambda x: x.find('$2') >= 0, dir($1))"; };

jyro · 2009-02-16 02:47:13 60
Eclipse needs to know the path to the local maven repository. Therefore the classpath variable M2_REPO has to be set.

Taken from - http://maven.apache.org/guides/mini/guide-ide-eclipse.html
This is sample output - yours may be different.
0

mvn -Declipse.workspace=<path-to-eclipse-workspace> eclipse:add-maven-repo

savaged · 2009-05-22 10:12:29 3

Geo Weather

This command will determine an individuals local weather, based on their I.P. address. I had to learn a lot about SED and a little about XMLStarlet in order to achieve this. This command is my original work and there is much room for improvement; I look forward to any constructive feedback. Show Sample Output

xmlstarlet fo "http://www.google.com/ig/api?weather=$(curl -s api.hostip.info/get_html.php?ip=$(curl -s icanhazip.com)... SEE SAMPLE OUTPUT

o0110o · 2010-02-11 06:32:44 5

display the ttl of a hostname in a human readable form

This function uses timetrans from the dnssec-tools to calculate the remaining time until a dns entry reaches its time to live and is fetched from the authoritive nameserver again. Show Sample Output
This is sample output - yours may be different.
```
$ ttl www.commandlinefu.com
17 minutes, 7 seconds
```
0

function ttl { /usr/sbin/timetrans -count $(dig +noquestion +noadditional +noauthority $1 | grep "^$1" | awk '{print $2}') }

cz8s · 2010-11-22 17:46:03 4
Dump /dev/ttyS0 on background automatically from startup

Put this command on /etc/rc.local.
This is sample output - yours may be different.
0

nohup cat /dev/ttyS0 | tee -a llamadas.db&

fjrojast · 2011-05-05 15:47:27 3
Displays all installed firmware in your Debian sytem
This is sample output - yours may be different.
0

aptitude search ~i ~nfirmware

gnugr · 2012-09-04 15:21:47 4
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A very quick and slick fork bomb. Handle with care. Don't run on production please...

Randomize lines (opposite of | sort)

Randomizes a file. The opposite of sort is sort -R!

copy remote ssh session output to local clipboard

ssh from local to remote and pipe output of file to the local clipboard

bash shortcut: !$ !^ !* !:3 !:h and !:t

When expanding, bash output the command, so don't be affraid if you type the command. Here is the details: First examples: $echo foo bar foobar barfoo First argument: $echo !$ echo barfoo barfoo (Note that typing echo foo bar foobar barfoo && echo !$, bash substitute !$ with $:1) Last argument: $echo foo bar foobar barfoo && echo !^ echo foo bar foobar barfoo && echo barfoo foo bar foobar barfoo barfoo All the arguments: $echo !* echo foo bar foobar barfoo foo bar foobar barfoo The third argument: $echo foo bar foobar barfoo && echo !:3 echo foo bar foobar barfoo && echo foobar foo bar foobar barfoo foobar You may want to add {} for large numbers: echo !:{11} for example Now with path: $echo /usr/bin/foobar /usr/bin/foobar For the head: $echo !$:h echo /usr/bin /usr/bin And the tail: $echo !$:t echo foobar foobar You also may want to try !:h and !:t or !!3-4 for the third and the fourth (so !!:* == !!:1-$)

cpu process limitation for specific processname like java,kibana

apt-get install cpulimit

ls not pattern

Negative shell globs already come with bash. Make sure to turn on extended pattern matching with 'shopt -e extglob'.

execute a command in case of success or execute a command in case of failure

Install pip with Proxy

Installs pip packages defining a proxy

list block devices

Shows all block devices in a tree with descruptions of what they are.

Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

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