Commands by rubenmoran

Commands by rubenmoran (27)

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Two command output

Summarize established connections after netstat output. Using tee and /dev/stderr you can send one command output to terminal before executing wc so you can summarize at the bottom of the output. Show Sample Output

netstat -n | grep ESTAB |grep :80 | tee /dev/stderr | wc -l

rubenmoran · 2016-06-26 11:37:19 22

Purgue foreing architecture packages on debian
This is sample output - yours may be different.
-1

dpkg -l |grep i386 | awk '{ print "apt-get -y remove --purge "$2 }' | sh

rubenmoran · 2013-03-23 19:19:24 2
while true ; do cpulimit -z -p $( pidof cc1 ) -l 5; sleep 1; done
This is sample output - yours may be different.
-1

Limit kernel compilation load

rubenmoran · 2012-11-12 18:04:40 2
Random file naming
This is sample output - yours may be different.
3

mv file.png $( mktemp -u | cut -d'.' -f2 ).png

rubenmoran · 2011-06-22 06:57:54 13

simulated text generator

Show Sample Output

tr -dc a-z0-9 </dev/urandom | tr 0-8 \ | tr 9 \\n | sed 's/^[ \t]*//' | fmt -u

rubenmoran · 2011-02-19 10:29:17 9

Sum file sizes

Computes total size of files in a directory. This value is different "du -b" because doesn't includes directory sizes. Show Sample Output
This is sample output - yours may be different.
```
9346375
```
0

find . -type f -printf %s\\n | paste -sd+ | bc

rubenmoran · 2011-02-10 09:44:36 2
Console clock
This is sample output - yours may be different.
-1

watch -n1 echo

rubenmoran · 2011-02-10 08:55:09 6
Calculate 1**2 + 2**2 + 3**2 + ...

I can't put the last ^2 with seq, so I reverse it to delete the last +N. So for doing sum(N^2) you have to do sum((N+1)^2). Must be a better way. Show Sample Output
This is sample output - yours may be different.
```
385
```
-2

seq -s^2+ 11 |rev| cut -d'+' -f2- | rev | bc

rubenmoran · 2011-02-10 08:41:14 6
Calculate N!
This is sample output - yours may be different.
8

seq -s* 10 |bc

rubenmoran · 2011-02-10 08:03:19 4
1+2-3+4-5+6-7 Series
This is sample output - yours may be different.
2

seq 1000 | paste -sd+- | bc

rubenmoran · 2011-02-09 20:03:49 3
Calculate N!

Show Sample Output
This is sample output - yours may be different.
```
3628800
```
1

seq 10 | paste -sd* | bc

rubenmoran · 2011-02-09 19:56:12 2
Calculate sum of N numbers (Thanks to flatcap)

Show Sample Output
This is sample output - yours may be different.
```
5000050000
```
1

seq 100000 | paste -sd+ | bc

rubenmoran · 2011-02-09 19:53:45 4
Find the package a command belongs to on Debian
This is sample output - yours may be different.
12

dpkg -S $( which ls )

rubenmoran · 2011-02-09 10:28:58 9
Compute the numeric sum of a file

In the file data.txt there is a single column of numbers. Sed adds a "+" between lines and xargs prepares the output for bc. The "echo 0" is to avoid to have a "+" at the beginning of the line. Show Sample Output
This is sample output - yours may be different.
```
104296050
```
1

sed i"+" file.txt | xargs echo 0 |bc

rubenmoran · 2011-02-09 10:14:22 6
Print info about your real user.

To get your effective user: whoami Show Sample Output
This is sample output - yours may be different.
```
monkey   pts/1        2010-06-07 15:46 (:0.0)
```
11

who loves mum

rubenmoran · 2010-06-07 14:02:18 6
copy file to clipboard

Loads file content on clipboard. Very useful when text selection size is higher than console size.
This is sample output - yours may be different.
8

xclip file.txt

rubenmoran · 2010-06-06 14:28:26 2
Get current Xorg resolution via xrandr

Not sure if it works the same on any shell. Show Sample Output
This is sample output - yours may be different.
```
1920x1080
```
3

xrandr | grep \* | cut -d' ' -f4

rubenmoran · 2010-05-30 15:50:12 3
Get your X11 screen mode
This is sample output - yours may be different.
3

xrandr | grep \*

rubenmoran · 2010-05-30 15:47:34 2
Base64 decode

Show Sample Output
This is sample output - yours may be different.
```
commandline.fu rocks
```
-3

echo Y29tbWFuZGxpbmUuZnUgcm9ja3MK | base64 -d

rubenmoran · 2010-05-25 07:21:14 2
creeate file named after actual date

Create a file with actual date as filename Show Sample Output
This is sample output - yours may be different.
```
filename-20100524.
--
Alternatives
touch file-`date +%Y%m%d`
touch file-$(date --iso)
```
3

touch file-$(date +%Y%m%d)

rubenmoran · 2010-05-24 07:43:45 4

Grep log between range of minutes

Returns logs between HH:M[Mx-My], for example, between 13:40 and 13:45. Show Sample Output

grep -i "$(date +%b" "%d )13:4[0-5]" syslog

rubenmoran · 2010-05-23 16:30:46 5

Grep syslog today last hour

Uses date to grep de logfile for today and uses it to get the last hour logs. Can be used to get last minute logs or today's logs. Show Sample Output
This is sample output - yours may be different.
```
May 23 18:10:01 tortatil /USR/SBIN/CRON[7620]: (root) CMD (if [ -x /usr/bin/mrtg ] 
May 23 18:10:02 laptop sSMTP[7624]: Unable to locate mail
May 23 18:10:02 laptop sSMTP[7624]: Cannot open mail:25
May 23 18:10:02 laptop /USR/SBIN/CRON[7616]: (root) MAIL (mailed 1 byte of output; but got status 0x000
```
6

grep -i "$(date +%b\ %d\ %H)" syslog

rubenmoran · 2010-05-23 16:18:15 8
Count accesses per domain

count the times a domain appears on a file which lines are URLs in the form http://domain/resource. Show Sample Output
This is sample output - yours may be different.
```
6 www.domain.one.com
11 www.domain.two.com
3 www.otherdomain.com
2 www.domainfour.es
```
2

cut -d'/' -f3 file | sort | uniq -c

rubenmoran · 2010-05-23 16:02:51 6
Extract ip addresses with sed

Extracts ip addressess from file using sed. Uses a tag(ip) to grep the IP lines after extracting. Must be a way to just output regex matched on sed. Show Sample Output
This is sample output - yours may be different.
```
83.233.165.56
92.123.73.25
92.123.73.57
92.123.73.8
95.100.117.11
```
2

sed -n 's/$[0-9]\{1,3\}\.$\{3\}[0-9]\{1,3\}/\nip&\n/gp' ips.txt | grep ip | sed 's/ip//'| sort | uniq

rubenmoran · 2010-05-23 11:26:32 4
Extract IPv4 addressess from file

Show Sample Output
This is sample output - yours may be different.
```
83.233.165.56
92.123.73.25
92.123.73.57
92.123.73.8
95.100.117.11
```
2

grep -Eo $[0-9]\{1,3\}[\.]$\{3\}[0-9] file | sort | uniq

rubenmoran · 2010-05-23 11:23:57 3
1 2 >

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Server load and process monitoring

In certain cases you mighy need to monitor the server load caused by certain process. For example HTTP, while stress testing apache using ab (apache benchmark) you may want to monitor the server status,load, # of spawned HTTP processes, # of established connections, # of connections in close wait state, apache memory footprint etc.

Change mysql prompt to be more verbose

You can put this into your shell sourced file like .bashrc or .zshrc to have a different mysql prompt. See http://dev.mysql.com/doc/refman/5.1/de/mysql-commands.html for more informations. Beware that currently with mysql 5.5 the seconds are buggy and won't be displayed if you put this into a .cnf file. With the enironment variable this will work.

Find usb device in realtime

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

diff output of two commands

This only works in bash

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

list files recursively by size

Show current working directory of a process

RTFM function

Simple edit to work for OSX. Now just add this to your ~/.profile and `source ~/.profile`

Get AWS temporary credentials ready to export based on a MFA virtual appliance

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

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