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Slow down IO heavy process

compare to alternative : - directly tests the -STOP of the process to continue or stop loop, - background operator should be set (or not) at the call of the function For extension i suggest a slowPID() based on kill like above and a slowCMD based on killall.
This is sample output - yours may be different.
-1

slow () { [ -n $1 ] && while kill -STOP $1; do sleep 1; kill -CONT $1; sleep 1; done }

makidoko · 2012-05-16 19:16:50 3
Store mp3 playlist on variable and play with mpg123

On my music directory, I create variable that contains all mp3s files, then I play them with mpg123. -C options enable terminal control key, s for stop, p for pause, f for forward to next song.
This is sample output - yours may be different.
-1

PLAYLIST=$(ls -1) ; mpg123 -C $PLAYLIST

servermanaged · 2009-03-19 17:20:28 12
Get just the IP for a hostname

Get just the IP address for a given hostname. For best results, make this a function in your shell rc file so that it can be used for things like traceroute: Titus:~$ traceroute `getip foo.com` traceroute to 64.94.125.138 (64.94.125.138), 64 hops max, 52 byte packets Show Sample Output
This is sample output - yours may be different.
```
Titus:~$ host foo.com|grep "has address "|cut -d" " -f4
64.94.125.138
```
-1

host foo.com|grep " has address "|cut -d" " -f4

dinomite · 2010-10-29 17:01:37 4
Find a process by name and automatically kill it
This is sample output - yours may be different.
-1

ps aux | grep name | grep -v grep | awk '{print $2}' | xargs kill -9

unixmonkey84604 · 2014-11-11 09:19:24 8
Make a statistic about the lines of code

Have wc work on each file then add up the total with awk; get a 43% speed increase on RHEL over using "-exec cat|wc -l" and a 67% increase on my Ubuntu laptop (this is with 10MB of data in 767 files).
This is sample output - yours may be different.
-1

find . -type f -name '*.c' -exec wc -l {} \; | awk '{sum+=$1} END {print sum}'

arcege · 2009-09-04 15:51:30 6
Static Yubikey 2.2 Password Using Programming Slot 1

By default, slot 1 is used for OTP purposes and validates against the Yubikey servers. Running the command above will replace that. If you have a Yubikey 2 or above, you can change -1 to -2 and program the second slot with a strong static key.
This is sample output - yours may be different.
-1

ykpersonalize -1 -ostatic-ticket -ostrong-pw1 -ostrong-pw2

switchrodeo720 · 2011-05-13 04:00:52 4
IP:PORT to IP:PORT:COUNTRY using geoiplookup

take a list of IP:PORT and output IP:PORT:COUNTRY Show Sample Output
This is sample output - yours may be different.
```
91.191.161.55:35828:Germany
62.212.73.107:54782:Netherlands
83.149.126.84:40972:Netherlands
78.159.112.45:50106:Germany
91.191.166.96:36133:Germany
62.212.73.107:36148:Netherlands
```
-1

for IP in `cat ip.txt|awk -F: '{print $1}'`; do geoiplookup -f /usr/local/share/GeoIP/GeoIP.dat $IP|awk -F, '{print $2}'>>out.txt; done; paste -d ":" ip.txt out.txt>zoom.txt

woben2 · 2011-08-05 09:26:17 3

Traffic stat on ethernet interface

Traffic details on the Ethernet interface. Show Sample Output

-1

ethtool -S eth0

rockon · 2009-03-01 10:25:46 5

Set default "New Page" as HTML in TextMate

When you press "cmd+n" in TextMate, you can have "HTML" language as default document format... You can also define other languages too. You need to know the UUID of your language bundle.
This is sample output - yours may be different.
-1

defaults write com.macromates.textmate OakDefaultLanguage 17994EC8-6B1D-11D9-AC3A-000D93589AF6

vigo · 2009-10-20 07:10:34 4
remove files and directories with acces time older than a given time

Deletes files older than "n" minutes ago. Note the plus sign before the n is important and means "greater than n". This is more precise than atime, since atime is specified in units of days. NOTE that you can use amin/atime, mmin/mtime, and cmin/ctime for access, modification, and change times, respectively. Also, using -delete is faster than piping to xargs, since no piping is needed.
This is sample output - yours may be different.
-1

find -amin +[n] -delete

TeacherTiger · 2009-11-20 17:15:28 4
List your installed Firefox extensions

1.) my profile ends with $USER not with .default 2.) only grep for the first occurrence because some extensions have the translated name also inside the install.rdf Show Sample Output
This is sample output - yours may be different.
```
 grep -hIr -m 1 :name ~/.mozilla/firefox/*.$USER/extensions | tr '<>=' '"""' | cut -f3 -d'"' | sort -u

Adblock Plus
Firebug
It's All Text!
lori (Life-of-request info)
ScrapBook
Secure Login
Session Manager
User Agent Switcher
```
-1

grep -hIr -m 1 :name ~/.mozilla/firefox/*.$USER/extensions | tr '<>=' '"""' | cut -f3 -d'"' | sort -u

new_user · 2010-05-18 14:49:44 5
Quickly check a device in a LVM volume group against multipath

This is an easy way to quickly get a status for a device in multipath on SLES systems, as long as the server is configured based on Novell's standards, where multipathed disks are referred to by /dev/disk/by-... tree. Make sure to replace name_of_vg with your Volume Group name.
This is sample output - yours may be different.
-1

pvscan | awk '/name_of_vg/ {print $2}' | sed 's/[-|/|]/ /g' | cut -d " " -f7

slashdot · 2010-06-22 16:34:42 3
Get just the IP for a hostname
This is sample output - yours may be different.
-1

gethostip -d hostname

ashayh · 2010-10-29 18:54:46 3
Change MySQL Pager For Nicer Output

Instead of dumping the entire query to the screen, it will use 'less -S' to handle pagination. This means you can move back and forward through the result set, and instead of wrapping rows at screen boundaries, the table will extend off the screen, and can be scrolled left and right with arrow keys.
This is sample output - yours may be different.
-1

In MySQL client, \P less -S

maxmanders · 2011-01-19 09:44:43 3
Setup Vim environment for USACO coding

1. Get name of task by task=$(basename "$(pwd)") 2. Check whether "$task.c" exists as a file 3. open "$task.c", "$task.in", "task.out" in vim with such layout. ------------------------------- | | $task.in | | | | |$task.c |-----------------| | | $task.out | | | | -------------------------------
This is sample output - yours may be different.
-1

alias viaco='task="$(basename "$(pwd)")"; if [ -f "$task.c" ]; then vi -c "set mouse=n" -c "set autoread" -c "vsplit $task.out" -c "split $task.in" -c "wincmd l" -c "wincmd H" $task.c; fi'

yolila · 2011-05-13 13:35:02 8
tiny proxy in shell to receive on port and write on unix socket
This is sample output - yours may be different.
-1

mk

adimania · 2014-07-19 18:13:52 7
Partition a new disk as all one partition tagged as "LInux LVM"

This is a bit hacky, but if you're setting up a bunch of new LUNs, it can save a bunch of time. Also check out sfdisk. The fdisk will fail if, for example, a partition table already exists.
This is sample output - yours may be different.
-1

echo -e "n\np\n1\n\n\nt\n8e\nw" | fdisk /dev/sdX

sud0er · 2009-10-20 16:21:54 5
tiny proxy in shell to receive on port and write on unix socket

* Make a FIFO file named replypipe * listen on 1234 * pass the request to unix socket * unix socket will reply to replypipe * replypipe will write reply to the client
This is sample output - yours may be different.
-1

mknod replypipe p; nc -k -lp 1234 < replypipe| nc -U /var/run/mysocket.sock > replypipe

adimania · 2014-07-19 18:17:35 7
rename file to *.old

This command renames the file 'filename' to 'filename.old' using shell expansion. Same as typing "mv filename filename.old".
This is sample output - yours may be different.
-1

mv filename{,.old}

BELzEBUB · 2018-03-08 12:41:18 27
extract links from a google results page saved as a file

From a saved page of google search results, split out all of the links for the results. Useful for creating apache rewrite rules from.
This is sample output - yours may be different.
-1

gsed -e :a -e 's/$<\/[^>]*>$/\1\n/g;s/$<br>$/\1\n/g' page2.txt | sed -n '/<cite>/p;s/<cite>$.*$<\/cite>/\1/g' >> output

shrimphead · 2009-02-06 12:45:20 12
Launch a Java .jar App

Use this to make a launcher for Java apps ( .jar files ) such as with jdownloader
This is sample output - yours may be different.
-1

java -jar /path/to/filename.jar

Bonster · 2011-04-01 05:44:56 15
Randomize lines (opposite of | sort)
This is sample output - yours may be different.
-1

ls -1 | xargs ruby -e'puts ARGV.shuffle'

jacaetevha · 2014-01-17 17:42:08 7
rows2columns

joins multiple lines to create single line with comma separated values. for example if we have an email addresses one per line (copy&paste from spreadsheet) it will oputput one line with comman separated addresses to put it to email client. Show Sample Output
This is sample output - yours may be different.
```
email@number.one, email@number.one, email@number.one, ...
```
-1

perl -le 'print join ", ", map { chomp; $_ } <>'

jozef · 2009-02-06 12:50:43 14
Autofind alive hosts on subnet upon connect

This is helpful if you connect to several networks with different subnets such as 192 networks, 10 networks, etc. Cuts first three octets of ip from ifconfig command and runs nmap ping scan on that subnet. Replace wlan0 with your interface. Assumes class c network, if class b use: cut -d "." -f 1-2 and change nmap command accordingly.
This is sample output - yours may be different.
-1

dhclient wlan0 && sbnt=$(ifconfig wlan0 |grep "inet addr" |cut -d ":" -f 2 | cut -d "." -f 1-3) && nmap $sbnt.0/24 -sP

wltj · 2010-06-22 21:00:29 6
List Seeon.tv Available Video Channels

This shows a list of channels from seeon.tv website to watch shows and movies
This is sample output - yours may be different.
-1

lynx --dump http://www.seeon.tv/channels| grep "/channels"|awk '{print $2}'|sort -u|while read links; do lynx --dump "$links"|awk '/view/ {print $2}'|sort -u; done

Bonster · 2011-04-01 05:58:20 5
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Open screen on the previous command

I often find myself wanting to open screen on whatever command I'm currently running. Unfortunately, opening a fresh screen session spawns a new bash session, which doesn't keep my history, so calling screen directly with the previous command is the only way to go.

Add date stamp to filenames of photos by Sony Xperia camera app

Sony's Xperia camera app creates files without time-stamped names. Thus, after deleting files on the phone, the same names will be reused. When uploading the photos to a cloud storage, this means that files will be overwritten. Running this command after every sync of uploaded photos with the computer prevents this.

list files recursively by size

Watch RX/TX rate of an interface in kb/s

Just a simple way without the need of additional tools. Of course, replace eth0 with your IF.

create an screenshot, upload it to your server via scp and then open that screenshot in firefox

I often need to send screenshots to other people to explain settings and whatever. So I created this oneline which I use to create the screenshot with imagemagik, upload it via scp to my server and then the command opens an firefox tab with the screenshot. The screenshot can be a region or a window. You just have to replace the parts beginning with YOUR.

Convert files from DOS line endings to UNIX line endings

This method will also convert mac line endings.

Remote copy directories and files through an SSH tunnel host

If you have lots of remote hosts sitting "behind" an ssh proxy host, then there is a special-case use of "rsynch" that allows one to easily copy directories and files across the ssh proxy host, without having to do two explicit copies: the '-e' option allows for a replacement "rsh" command. We use this option to specify an "ssh" tunnel command, with the '-A' option that causes authentication agent requests to be forwarded back to the local host. If you have ssh set up correctly, the above command can be done without any passwords being entered.

Number of open connections per ip.

Here is a command line to run on your server if you think your server is under attack. It prints our a list of open connections to your server and sorts them by amount. BSD Version: $ netstat -na |awk '{print $5}' |cut -d "." -f1,2,3,4 |sort |uniq -c |sort -nr

print line and execute it in BASH

!# is the currennt line so far, by using !#:- you can go from the second arg (it's zero indexed) to the last ($) (did I understand the problem correctly?)

check open ports without netstat or lsof

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