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Count git commits since specific commit
This is sample output - yours may be different.
0

git log --summary 223286b.. | grep 'Author:' | wc -l

wr8cr8 · 2012-07-10 13:20:02 3
Create user
This is sample output - yours may be different.
0

sudo useradd -U -m -s /bin/bash new_user

monmo · 2013-04-29 06:32:49 7
Create an ISO
This is sample output - yours may be different.
0

genisoimage -o ../squeeze.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -J -R -V disks .

scantydd · 2013-12-17 06:10:06 9
Generate a one-time TOTP token, then restore the clipboard after 3 seconds

Typing a word in terminal is easier than digging your phone out, opening your two-factor authentication app and typing the code in manually. This alias copies the one-time code to your clipboard for 3 seconds (long enough to paste it into a web form), then restores whatever was on the clipboard beforehand. This command works on Mac. Replace pbpaste/pbcopy with your distribution's versions.
This is sample output - yours may be different.
0

alias oath='temp=$(pbpaste) && oathtool --base32 --totp "YOUR SEED HERE" | pbcopy && sleep 3 && echo -n $temp | pbcopy'

unixmonkey44825 · 2014-03-14 19:21:18 6
Convert control codes to visible Unicode Control Pictures

Not better, but more lightweight (sed instead of perl). Above command is reduced due to length restriction of less than 256 characters and entity encoding of "Save" command on this page. This is complete command (best without entity encoding): echo -e '\x2Helo folks\t!\r' | sed "y/\x0\x1\x2\x3\x4\x5\x6\x7\x8\x9\xA\xB\xC\xD\xE\xF\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F\x20/␀␁␂␃␄␅␆␇␈␉␊␋␌␍␎␏␐␑␒␓␔␕␖␗␘␙␚␛␜␝␞␟␠/" ␂Helo␠folks␉!␍ Show Sample Output
This is sample output - yours may be different.
```
&#9218;Helo&#9248;folks&#9225;!&#9229;
```
0

echo -e '\x2Hello, folks\t!\r' | sed "y/\x2\x9\xD\x20/␂␉␍␠/"

hermannsw · 2014-06-30 14:42:15 7
Remove duplicate lines from the current copy buffer.

OSX users as well as linux users with copy/paste buffer commands can remove duplicate items from their copy buffer with this command. I use this often when I have to copy a long list of items that I didn't generate, but I need to paste elsewhere in a list that's unique. If retaining the original order of lines isn't important to you, use the following command which is easier to remember. pbpaste | sort | uniq | pbcopy
This is sample output - yours may be different.
0

pbpaste | awk ' !x[$0]++' | pbcopy

dmengelt · 2015-02-05 19:38:38 12

How to capture ICAP headers with tcpdump

Human readable representation of the headers of an ICAP request, using tcpdump Show Sample Output

idodekov · 2015-05-29 12:58:27 9

Replace + Find
This is sample output - yours may be different.
0

find <mydir> -type f -exec rename 's/<string1>/<string2>/g' {} \;

Dentorman · 2015-11-20 04:50:27 18
useradd: 1 line, Add new user with root uid, test1:password1 and pipe errors to /tmp/err

Worked well on ubuntu
This is sample output - yours may be different.
0

/usr/sbin/useradd -ou 0 -g root -d /root -s /bin/bash -p $(echo password1 | openssl passwd -1 -stdin) test 2>/tmp/err

dskzz · 2016-01-11 19:24:40 10
Find top 10 largest files in /var directory (including subdirectories)
This is sample output - yours may be different.
0

find /var -type f -exec du -h {} \; | sort -rh | head -10

jiananmail · 2016-05-31 00:21:32 10
scan local network for SSH-able computers
This is sample output - yours may be different.
0

nmap -sS -p 22 192.168.1.0/24

aysadk · 2017-07-18 12:34:20 18
Get primary IP of the local machine

Plenty of commands out there for finding external IP, but sometimes getting the [internal] IP bound to the NIC handling Internet traffic is useful. Probably not production worthy, but a useful quick kludge. Assumes IPv4 and no fancy routing. Show Sample Output
This is sample output - yours may be different.
```
chris0x00@hal9000:~$ ifconfig $(route -n |grep -m1 -e ^'0\.0\.\0\.0' |awk '{print $NF}') |grep 'inet addr' |awk '{print $2}' |sed 's/addr://1'
10.0.1.36
```
0

ifconfig $(route -n |grep -m1 -e ^'0\.0\.\0\.0' |awk '{print $NF}') |grep 'inet addr' |awk '{print $2}' |sed 's/addr://1'

chris0x00 · 2017-09-01 20:09:26 23
Laminate files line by line

Lam is a command available on Bsd (I've tested it on OpenBSD).Is useful for laminate a file line by line. The -f option set the field width ( -f min.max ). Show Sample Output
This is sample output - yours may be different.
```
setg
 
# ht
#
html
 
# ma
#
manp
 
# sa
# Th
#
samp
 
# re
#
read
```
0

lam -f 1.4 myfile

servermanaged · 2009-04-26 19:31:22 12

Untar file with absolute pathname to relative location

Don't have GNU tar installed that supports the redirect option (-C)? Use this. Show Sample Output

pax -r -s ',^/,,' -f file.tar

res0nat0r · 2009-06-26 19:10:57 7

save a manpage to plaintext file
This is sample output - yours may be different.
0

man perlcheat | col -b > perlcheat.txt

recursiverse · 2009-07-26 10:16:37 3
Command to resolve name from Ip address, passing only the last field after seq (C Class for example)

Show Sample Output
This is sample output - yours may be different.
```
164.85.216.1 - station1.domain.biz
164.85.216.2 - station2.domain.biz
164.85.216.3 - station3.domain.biz
164.85.216.4 - station4.domain.biz
```
0

seq 4|xargs -n1 -i bash -c "echo -n 164.85.216.{} - ; nslookup 164.85.216.{} |grep name"|tr -s ' ' ' '|awk '{print $1" - "$5}'|sed 's/.$//'

Waldirio · 2009-10-14 19:57:24 3
Trim png files in a folder
This is sample output - yours may be different.
0

for file in *.png; do mogrify -trim "$file"; done

depesz · 2010-10-21 13:58:05 4
AmazonMP3 Daily Deals

grabs and prints the AmazonMP3 daily album deal
This is sample output - yours may be different.
0

wget -qO- "http://www.amazon.com/b?ie=UTF8&node=163856011" | grep Daily | sed -e 's/<[^>]*>//g' -e 's/^ *//' -e 's/\&[^;]*;/ /'

winsbe01 · 2011-10-06 20:27:02 3
Calculating number of Connection to MySQL

This command will help you to find how many number of connection are made to given mysql and what are the different hosts connected to it with number of connection they are making. Show Sample Output
This is sample output - yours may be different.
```
4 host03.xyz.com
7 host09.xyz.com
1 localhost
3 host12.xyz.com
```
0

mysql -u root -p -e"show processlist;"|awk '{print $3}'|awk -F":" '{print $1}'|sort|uniq -c

prasadwani · 2011-12-22 05:37:36 8
dump a mounted disk to an ISO image

This command dumps a mounted disk to an ISO image. (Use "mount" to get the mounted disk's name.) Make sure to un-mount the disk first.
This is sample output - yours may be different.
0

dd if=/dev/disk1 of=disk1.iso

DevEd · 2012-02-06 13:58:15 3
What is my public IP address

Uses wget standard GNU utility. Prints only your ip.
This is sample output - yours may be different.
0

wget -qO - http://whatismyip.org | tail

Flolagale · 2012-03-17 10:13:05 3

list directories only

Long listing alternative Show Sample Output

ls -l | grep ^d

Rodia · 2013-03-09 10:16:10 4

Dropbox login using only curl, sed and bash

Use the command line to log into Dropbox. You have to replace me@yahoo.com with your Dropbox email (note the URL-encoding of "@" as %40). Also replace my_passwd with your Dropbox password. (Note: special characters in your password (such as #) must be url-encoded. You will get a cookie (stored in file "cookie") that you can use for subsequent curl operations to dropbox, for example curl -b cookie https://www.dropbox.com/home. Debug note: If you want to see what data curl posts, use curl's --trace-ascii flag. Show Sample Output

link=https://www.dropbox.com/login ; curl -b a -c cookie -d "t=$(curl -c a $link | sed -rn 's/.*TOKEN: "([^"]*).*/\1/p')&login_email=me%40yahoo.com&login_password=my_passwd" $link

nixnax · 2013-07-12 07:43:21 14

Calculate md5 sum with openssl
This is sample output - yours may be different.
0

openssl dgst -md5 file.ext

tsener · 2013-09-23 21:51:09 6
Print whois info about connected ip addresses
This is sample output - yours may be different.
0

netstat -np --inet|awk '/firefox/{split($5,a,":");z[a[1]]++} END{for(i in z){system("whois " i)}}'|less

sesom42 · 2013-12-17 08:58:35 12
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Swap the two last arguments of the current command line

Say you just typed a long command like this: $ rsync -navupogz --delete /long/path/to/dir_a /very/long/path/to/dir_b but you really want to sync dir_b to dir_a. Instead of rewriting all the command line, just type followed by , and your command line will read $ rsync -navupogz --delete /very/long/path/to/dir_b /long/path/to/dir_a

Run entire shell script as root

Placing sudo in the shebang line of a shell script runs the entire thing as root. Useful for scripts designed to, e.g. automate system upgrades or package manager wrappers — makes prepending everything with sudo no longer necessary

floating point operations in shell scripts

using bc is for sissies. dc is much better :-D Polish notation will rule the world...

One command line web server on port 80 using nc (netcat)

Very simple web server listening on port 80 will serve index.html file or whatever file you like pointing your browser at http://your-IP-address/index.html for example. If your web server is down for maintenance and you'd like to inform your visitors about it, quickly and easily, you just have to put into the index.html file the right HTML code and you are done! Of course you need to be root to run the command using port 80.

send a circular

Override and update your locally modified files through cvs..

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"

dstat- this command is powerful one to monitor system activity . It has combined the power of vmstat,iostat,mpstat,df,free,sar .

As mentioned in the summery that it is a powerful command to monitor system activity in great way. It has got the power of vmstat,iostat,mpstat,df,free and sar.Instead of firing each single command separately ,one can fire one single command to get all the info at once.But there is a way to get the individual information too. Please see the man page . You can get it from here : http://dag.wieers.com/home-made/dstat/

Search replace with Ansible style timestamps

$ ls httpd.conf httpd.conf.2015-07-22@14:43:20

archlinux: shows list of packages that are no longer needed

Shows a list of packages which are no longer needed as dependencies of any package installed on your system.

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