Commands using grep sorted by votes

Commands using grep (1,935)

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Lookup autonomous systems of all outgoing http/s traffic

Using GNU Grep with perl regexp (works on newer Ubuntus) Show Sample Output
This is sample output - yours may be different.
```
16509   | 54.93.1.1    | AMAZON-02 - Amazon.com, Inc., US
```
0

ss -t -o state established '( dport = :443 || dport = :80 )' | grep -Po '([0-9a-z:.]*)(?=:http[s])' | sort -u|netcat whois.cymru.com 43|grep -v "AS Name"|sort -t'|' -k3

miniker84 · 2016-04-08 09:07:39 12
Listing only one repository with yum
This is sample output - yours may be different.
0

yum list | grep my_repository_name

alleen1 · 2016-04-19 16:12:24 11
Finding commands to create alias for

by determining most popular use in history using percentage . Show Sample Output
This is sample output - yours may be different.
```
     1  187  25.7931%   sudo
     2  63   8.68966%   ls
     3  43   5.93103%   ping
     4  31   4.27586%   soccer
     5  26   3.58621%   cd
     6  21   2.89655%   zypper
     7  19   2.62069%   nmcli
     8  17   2.34483%   python
     9  17   2.34483%   find
    10  17   2.34483%   cat
```
0

history | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl | head -n10

turrtle13 · 2016-04-24 17:21:35 9
Btrfs: Find file names with checksum errors

debian kernel 4.4.6 Show Sample Output
This is sample output - yours may be different.
```
images/10000/vm-10000-disk-1.raw
images/8001/BUGBTRFS/vm-8001-disk-2.raw
images/9003/vm-9003-disk-2.raw.crash.btrfs
```
0

grep "checksum error at logical" /var/log/messages | egrep -o "[^ ]+$" | tr -d ')' | sort | uniq

andrefalgon · 2016-04-30 09:13:36 8
list java heap summary
This is sample output - yours may be different.
0

ps -ef | grep -oh 'Xmx[0-9]*' | cut -d'x' -f2 | awk '{SUM += $1} END { print SUM}'

Raboo · 2016-05-13 11:12:08 12
Get HTTP Codes for All Websites in Apache Configuration files.

Check that all websites on the current server are working as expected. This is a quick easy way to do that. Show Sample Output
This is sample output - yours may be different.
```
projectivemotion.com,200
www.projectivemotion.com,301
amadomartinez.mx,200
anotherwebsite.com,301
somethinghappening.com,500
anothererror.com,500
```
0

grep -h 'Server$Name\|Alias$' /etc/httpd/conf.d/*.conf | sed 's#\s*Server$Name\|Alias$\s*##g' | tr ' ' "\n" | xargs -I{} sh -c 'echo {},`curl -s -o /dev/null -w "%{http_code}" {}`'

AmadoMartinez · 2016-05-13 17:16:52 10
delete some 4 months old docker images, not using force
This is sample output - yours may be different.
0

docker images |grep '4 months' | awk '{print$3}' | xargs docker rmi

breign · 2016-05-25 12:50:30 10
Monitor Redis memory usage
This is sample output - yours may be different.
0

redis-cli -r 100 -i 1 info | grep used_memory_human:

fadlee · 2016-06-01 09:43:21 33
Get all ProcID's for a given process

If you have to stop a bunch of processes or just want to get a list of their ID's, us this replacing with your process. Then you can use a loop to kill -9 all of them. Show Sample Output
This is sample output - yours may be different.
```
777
917
918
1012
1013
1855
```
0

sudo <PROC_NAME> -aux |grep pals_ |tr -s " " |cut -d " " -f2

dskzz · 2016-06-05 02:14:10 12
Auto-kill auto-spawned process

Given a process name (kdiff3 in this example) that keeps auto-spawning/starting, auto-kill until it stops, assuming there is an upper limit (if not, reboot). This was beneficial after I clicked the DIFF button in a git GUI on a merge commit. 2000+ files were being opened one after the other in my diff program (kdiff3). Each time I closed one (or quit Kdiff3), the next file would be auto-opened in Kdiff3.
This is sample output - yours may be different.
0

while [ ! -z $(ps -A | grep -m1 kdiff3 | awk '{print $1}') ]; do kill -9 $(ps -A | grep -m1 kdiff3 | awk '{print $1}'); sleep 1; done

supervisord · 2016-06-07 21:56:44 12
who is the console user?

Finds the login id of the user that owns the console. I use it to reset my touchpad after resume from suspend in /etc/pm/sleep.d/s99local
This is sample output - yours may be different.
0

who | grep :0 | head -1 | cut -d " " -f 1

mikef5410 · 2016-06-22 17:33:38 12

Display playing parameters of soundcards

grep -r "" /proc/asound/card*/pcm*/sub*/hw_params

george23 · 2016-07-04 15:19:50 15

4chan image batch downloader

Replace thread_link with the link of the thread you want to download images of.
This is sample output - yours may be different.
0

wget thread_link -qO - | sed 's/\ /\n/g' | grep -e png -e jpg | grep href | sed 's/href\=\"/http:/g' | sed 's/"//g' | uniq | xargs wget

hztrance · 2016-07-16 20:43:33 12
tail from the last occurrence of a pattern to the end of the (log) file

I wanted a method to display the last run of my script from my log file. I had a pattern I could grep for to find the beginning of each run. This command line greps for that pattern in the log, finds the last occurrence and gives me the line number. Then I use the line number in tail to give me everything from that line number to the end of the log file. I tested this on Linux Mint (variant of Ubuntu) and on RHEL, but I suspect it will run many Linux systems.
This is sample output - yours may be different.
0

grep -n PATTERN /logs/somelog.log | cut -f1 -d: | tail -1 | xargs -I num tail -n +num /logs/somelog.log

goeltzec · 2016-07-29 15:47:26 29
Disk usage summary

Adds up the used disk space on all hard drives that are directly connected to the machine (i.e. no network mounts etc.) Assumes there are no IDE drives present. Show Sample Output
This is sample output - yours may be different.
```
18 GiB used in total
```
0

echo $(df -BG | grep sd | awk '{print $3}' | paste -sd+ | tr -d G | bc) GiB used in total

thureduehrsen · 2016-08-09 10:08:35 38
Show Available Disk Usage | Pretty Way

Shows available disk space on sda1 animated with colors Show Sample Output
This is sample output - yours may be different.
```
337G 
```
0

clear && df -h | grep /dev/sda1 | awk {'print $4'} | lolcat -a -s 10

frozenvortex · 2016-08-10 21:42:38 12
Last shutdown date and time of a system
This is sample output - yours may be different.
0

last -x | grep shutdown | head -1

creepyjones · 2016-08-10 21:51:48 12
Toggle MPD speaker output

Requires mpc command line client Assumes only one output with "Local" in the name
This is sample output - yours may be different.
0

read -r -a MOUT <<< `mpc outputs | grep Local`; if [ ${MOUT[-1]} == "disabled" ]; then mpc enable ${MOUT[1]} 2&>1 > /dev/null; else mpc disable ${MOUT[1]} 2&>1 > /dev/null; fi

jtopian · 2016-08-23 04:02:56 13
Watch PHP log, without knowing it's location (gets from php.ini)

Runs "php -i", filter the error_log location, then watches it using "tail"
This is sample output - yours may be different.
0

tail -v -f $(php -i | grep "^[ \t]*error_log" | awk -F"=>" '{ print $2; }' | sed 's/^[ ]*//g')

paulera · 2016-08-31 12:13:31 25
Grab the first 3 octets of your ip addresses
This is sample output - yours may be different.
0

hostname -i | tr " " "\n" | grep -v "::\|^169.254\|^127.0.0.1" | cut -d"." -f1-3

muggahtee · 2016-09-01 14:39:02 14
Extract binary from .text section (shellcode)

Extracts the binary from the .text section and escapes it. This puts it in a form ready to use in a program. Show Sample Output
This is sample output - yours may be different.
```
\x31\xd2\x31\xc9\xbb\xb4\x90\x04\x08\xb0\x05\xcd\x80\xb2\x10\xb9\xc4\x90\x04\x08\x89\xc3\xb0\x03\xcd\x80\x89\xdf\xb2\x10\xb9\xc4\x90\x04\x08\xb3\x01\xb0\x04\xcd\x80\x89\xfb\xb0\x06\xcd\x80\xb0\x01\xcd\x80
```
0

objdump -d -j .text ExeHere | grep -e '^ ' | tr '[[:space:]]' '\n' | egrep '^[[:alnum:]]{2}$' | xargs | sed 's/ /\\x/g' | sed -e 's/^/\\x/g'

keyboardsage · 2016-09-11 07:15:00 16
See how many times you've typed 'ls' by itself

I seem to do this compulsively every time I change directories, sometimes even when I don't, even if I know exactly what I need to do. (Don't worry, the sample output is just an exaggeration. :) Show Sample Output
This is sample output - yours may be different.
```
23934729
```
0

grep -cx ls ~/.bash_history

Sparkette · 2016-09-14 17:06:59 17
Delete all php package
This is sample output - yours may be different.
0

sudo apt-get purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "`

bDrwx · 2016-09-23 15:33:18 25
List used Perl libraries in Perl project
This is sample output - yours may be different.
0

find . -type f $ -name '*.pm' -o -name '*.pl' $ | xargs grep "^use " | cut -d : -f2 | sort | uniq

tlezotte · 2016-09-28 19:59:38 16
Gets shellcode opcodes from binary file using objdump

Seems to work on Ubuntu 14.02 LTS Show Sample Output
This is sample output - yours may be different.
```
"\x31\xc0\xb0\x04\x31\xdb\xb3\x01\xeb\x11\x59\x31\xd2\xb2\x0e\xcd\x80\x31"
```
0

objdump -s ./HelloWorld | grep -v '^ [0-9a-f][0-9a-f][0-9a-f][0-9a-f] \b' | grep -v 'Contents' | grep -v './' | cut -d' ' -f 3-6| sed 's/ //g' | sed '/./!d' | tr -d '\n'| sed 's/.\{2\}/&\\x/g' | sed 's/^/\\x/'|sed 's/..$//'|sed 's/^/"/;s/$/"/g'

mark20 · 2016-10-05 23:31:05 17
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Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Send e-mail if host is 'dead' or not reachable

Cleaner with a mailto assignment in crontab (if the command fails you get an email): MAILTO=admin@example.com 10,30,50 * * * * ping -q -c1 -w3 192.168.0.14 >/dev/null

Print current running shell, PID

works as well as echo $0, but also prints process id, which pts you're using. echo $SHELL doesn't always get updated when changing shells, so this is a better solution than that. Just one more variation on a theme.

Check wireless link quality with dialog box

The variable WIRELESSINTERFACE indicates your wireless interface

Write and read HDD external

Write and read HDD external FreeBSD

Triple monitoring in screen

This command starts screen with 'htop', 'nethogs' and 'iotop' in split-screen. You have to have these three commands (of course) and specify the interface for nethogs - mine is wlan0, I could have acquired the interface from the default route extending the command but this way is simpler. htop is a wonderful top replacement with many interactive commands and configuration options. nethogs is a program which tells which processes are using the most bandwidth. iotop tells which processes are using the most I/O. The command creates a temporary "screenrc" file which it uses for doing the triple-monitoring. You can see several examples of screenrc files here: http://www.softpanorama.org/Utilities/Screen/screenrc_examples.shtml

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"

Get a list of ssh servers on the local subnet

--open -sV is not needed if you are only looking for hosts with 22 open

nice disk usage, sorted by size, see description for full command

full command below, would not let me put full command in text box du -sk ./* | sort -nr | awk 'BEGIN{ pref[1]="K"; pref[2]="M"; pref[3]="G";} { total = total + $1; x = $1; y = 1; while( x > 1024 ) { x = (x + 1023)/1024; y++; } printf("%g%s\t%s\n",int(x*10)/10,pref[y],$2); } END { y = 1; while( total > 1024 ) { total = (total + 1023)/1024; y++; } printf("Total: %g%s\n",int(total*10)/10,pref[y]); }'

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

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Commands using grep (1,935)

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