Commands using head sorted by votes

Commands using head (314)

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a function to find the fastest DNS server

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list. Show Sample Output
This is sample output - yours may be different.
```
12.876  200.187.95.4
```
1

curl -s http://public-dns.info/nameserver/br.csv| cut -d, -f1 | xargs -i timeout 1 ping -c1 -w 1 {} | grep time | sed -u "s/.* from $[^:]*$.*time=$[^ ]*$.*/\2\t\1/g" | sort -n | head -n1

glaudiston · 2017-02-02 12:00:38 20
ram usage most top 10 process
This is sample output - yours may be different.
1

ps aux | awk '{print $2, $4, $11}' | sort -k2rn | head -n 10

aysadk · 2017-09-19 19:40:49 18
Generate Random Text based on Length

Random text of length "$1" without the useless cat command.
This is sample output - yours may be different.
1

genRandomText() { tr -cd '[:alpha:]' < /dev/urandom | head -c "$1"; }

SouthwindCG · 2018-06-05 03:41:14 223
Print the 16 most recent RPM packages installed in newest to oldest order
This is sample output - yours may be different.
1

rpm -qa --last | head -n 16

sparsile · 2018-09-13 02:55:51 341
Show OS release incl version.

Show Sample Output
This is sample output - yours may be different.
```
Gentoo Base System release 2.6
```
1

grep -m1 -h [0-9] /etc/{*elease,issue} 2>/dev/null | head -1

wuseman1 · 2018-11-12 18:01:57 660
get a list of top 1000 sites from alexa

a little bit smarter & i only want .de domains, so ..... Show Sample Output
This is sample output - yours may be different.
```
amazon.de
google.de
ebay.de
ebay-kleinanzeigen.de
spiegel.de
web.de
bild.de
t-online.de
poe.trade
mobile.de
chip.de
```
1

curl -qsSl http://s3.amazonaws.com/alexa-static/top-1m.csv.zip 2>/dev/null | zcat | grep ".de$" | head -1000 | awk -F, '{print $2}'

dbiesecke · 2019-06-12 02:48:42 35
Find out how much ram memory has your video (graphic) card
This is sample output - yours may be different.
1

glxinfo |grep -i -o 'device|memory\|[0-9]\{1,12\} MB'|head -n 1

wuseman1 · 2020-09-14 02:12:47 768
Compute newest kernel version from Makefile on Torvalds' git repository

The platform-agnostic version of https://www.commandlinefu.com/commands/view/25276/compute-newest-kernel-version-from-makefile-on-torvalds-git-repository because macOS doesn't have wget installed
This is sample output - yours may be different.
1

curl -s -o - https://raw.githubusercontent.com/torvalds/linux/master/Makefile | head -n5 | grep -E '\ \=\ [0-9]{1,}' | cut -d' ' -f3 | tr '\n' '.' | sed -e "s/\.$//"

realkstrawn93 · 2023-08-10 22:25:55 228
mem leak check

sh as: #! /bin/sh while [ 1 -ne 6 ]; do pid=`ps -ef | grep -v "grep" | grep "trans_gzdy" | cut -c10-17` ps gv $pid | head -2 sleep 1 done check changes of RSS. Show Sample Output
This is sample output - yours may be different.
```
PID    TTY STAT  TIME PGIN  SIZE   RSS   LIM  TSIZ   TRS %CPU %MEM COMMAND
 651368      - A     0:00    1  3360  3860 327680   255   500  0.0  0.0 trans_gz
```
0

ps gv [pid] | head -2

ren · 2009-02-12 05:04:55 9
A bash function to show the files most recently modified in the named (or current) directory

Coming back to a project directory after sometime elsewhere? Need to know what the most recently modified files are? This little function "t" is one of my most frequent commands. I have a tcsh alias for it also: alias t 'ls -ltch \!* | head -20' Show Sample Output
This is sample output - yours may be different.
```
% t
total 79768
drwxr-xr-x  79 aks   staff   2.6K Feb 24 23:38 aspell6-en-6.0-0/
drwxr-xr-x@ 53 aks   staff   1.8K Feb 24 23:21 aspell-0.60.6/
-rw-r--r--@  1 aks   staff   1.7M Feb 24 23:14 aspell-0.60.6.tar.gz
drwxr-xr-x   3 aks   staff   102B Dec 15 23:24 finance/
drwxr-xr-x   4 aks   staff   136B Dec  9 14:29 dev/
drwxr-xr-x  12 aks   staff   408B Aug 28  2008 db/
drwxr-xr-x   4 aks   staff   136B Aug  7  2008 Palm/
drwxr-xr-x  26 aks   staff   884B Jan 28  2008 web/
```
0

function t { ls -ltch $* | head -20 ; }

totoro · 2009-03-25 20:05:52 8
Show the ordered header line (with field names) of a CSV file

This little command (function) shows the CSV header fields (which are field names separated by commas) as an ordered list, clearly showing the fields and their order. Show Sample Output
This is sample output - yours may be different.
```
% headers table.csv 
    1	Date
    2	Open
    3	High
    4	Low
    5	Close
    6	Volume
    7	Adj Close
```
0

function headers { head -1 $* | tr ',' '\12' | pr -t -n ; }

totoro · 2009-03-25 20:07:47 14
Tail the most recently modified file
This is sample output - yours may be different.
0

ls -t1 | head -n1 | xargs tail -f

patko · 2009-07-29 13:46:29 5
skipping five lines, at top, then at bottom

Strangely enough, there is no option --lines=[negative] with tail, like the head's one, so we have to use sed, which is very short and clear, you see. Strangely more enough, skipping lines at the bottom with sed is not short nor clear. From Sed one liner : # delete the last 10 lines of a file $ sed -e :a -e '$d;N;2,10ba' -e 'P;D' # method 1 $ sed -n -e :a -e '1,10!{P;N;D;};N;ba' # method 2 Show Sample Output
This is sample output - yours may be different.
```
6 7 8 9 10 11 12
1 2 3 4 5 6 7
```
0

seq 1 12 | sed 1,5d ; seq 1 12 | head --lines=-5

flux · 2009-08-01 00:41:52 8
List files and sizes

List files and sizes
This is sample output - yours may be different.
0

find / -type f -exec wc -c {} \; | sort -nr | head -100

hemanth · 2009-08-22 09:38:44 10
Download entire commandlinefu archive to single file

This is an extension of a previous command by satyavvd on 2009-07-23 12:04:02, but this one grabs the whole archive. Hard coded numbers in previous script capped number of commands that could be fetched. This one grabs them all regardless of how big the archive gets. Show Sample Output
This is sample output - yours may be different.
```
# SSH connection through host in the middle
ssh -t reachable_host ssh unreachable_host

# A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram
sudo dd if=/dev/mem | cat | strings

# Watch Star Wars via telnet
telnet towel.blinkenlights.nl

# Backticks are evil
echo "The date is: $(date +%D)"
```
0

for x in `jot - 0 \`curl "http://www.commandlinefu.com/commands/browse"|grep "Terminal - All commands" |perl -pe 's/.+(\d+),(\d+).+/$1$2/'|head -n1\` 25`; do curl "http://www.commandlinefu.com/commands/browse/sort-by-votes/plaintext/$x" ; done >a.txt

stinkerweed999 · 2009-08-25 21:57:15 6
Outputs a 10-digit random number

Makes use of $RANDOM environment variable.
This is sample output - yours may be different.
0

head -c10 <(echo $RANDOM$RANDOM$RANDOM)

jgc · 2009-10-09 15:09:02 6
Sort movies by length, longest first

Similar but using mediainfo instead of totem-something
This is sample output - yours may be different.
0

for i in *.avi; do echo -n "$i:";mediainfo $i|head | grep PlayTime | cut -d: -f2 ; done | sort -t: -k2 -r

yooreck · 2009-11-09 12:42:20 3
Create unique email addresses directly from the US census site*Full command in comments

** Replace the ... in URLS with: www.census.gov/genealogy/www/data/1990surnames Couldn't fit in 256 Created on Ubuntu 9.10 but nothing out of the ordinary, should work anywhere with a little tweaking. 5163 is the number of unique first names you get when combine the male and female first name files from. http://www.census.gov/genealogy/www/data/1990surnames/names_files.html Show Sample Output
This is sample output - yours may be different.
```
stasia.palmer@test.domain
mozell.sybounheuan@test.domain
yuki.nypaver@test.domain
annamae.tilbury@test.domain
jaimee.warfield@test.domain
cassidy.mchugh@test.domain
daniele.makey@test.domain
ivelisse.besancon@test.domain
marylin.kocher@test.domain
```
0

paste -d "." <(curl http://.../dist.female.first http://.../dist.male.first | cut -d " " -f 1 | sort -uR) <(curl http://..../dist.all.last | cut -d " " -f 1 | sort -R | head -5163) | tr "[:upper:]" "[:lower:]" | sed 's/$/@test.domain/g'

connorsy · 2010-01-21 19:52:28 3
Update the working tree to the latest git commit
This is sample output - yours may be different.
0

git log -g --pretty=oneline | grep '}: commit' | awk '{print $1}' | head -1 | xargs git checkout -f

jimthunderbird · 2010-03-09 16:56:39 3
Generate an over-the-top UUID

first off, if you just want a random UUID, here's the actual command to use: uuidgen Your chances of finding a duplicate after running this nonstop for a year are about the same as being hit by a meteorite before finishing this sentence The reason for the command I have is that it's more provably unique than the one that uuidgen creates. uuidgen creates a random one by default, or an unencrypted one based on time and network address if you give it the -t option. Mine uses the mac address of the ethernet interface, the process id of the caller, and the system time down to nanosecond resolution, which is provably unique over all computers past, present, and future, subject to collisions in the cryptographic hash used, and the uniqueness of your mac address. Warning: feel free to experiment, but be warned that the stdin of the hash is binary data at that point, which may mess up your terminal if you don't pipe it into something. If it does mess up though, just type reset Show Sample Output
This is sample output - yours may be different.
```
7d9afbd91e49e265841c0d6c953e964a
```
0

printf $(( echo "obase=16;$(echo $$$(date +%s%N))"|bc; ip link show|sed -n '/eth/ {N; p}'|grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}'|head -c 17 )|tr -d [:space:][:punct:] |sed 's/[[:xdigit:]]\{2\}/\\x&/g')|sha1sum|head -c 32; echo

camocrazed · 2010-07-14 14:04:53 10
Play 2600 off the hook over ssh

Ever wanted to stream your favorite podcast across the network, well now you can. This command will parse the iTunes enabled podcast and stream the latest episode across the network through ssh encryption. Show Sample Output
This is sample output - yours may be different.
```
High Preformance MPEG 1.0/2.0/2.5 Audio Player for Layer 1, 2 and 3.
Version 0.59s-mh4 (2000/Oct/27). Written and copyrights by Michael Hipp.
Uses code from various people. See 'README' for more!
THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTY! USE AT YOUR OWN RISK!

Playing MPEG stream from standard input ...
Found new ID3 Header
MPEG 2.0 layer III, 64 kbit/s, 22050 Hz joint-stereo
```
0

curl -L -s `curl -s http://www.2600.com/oth-broadband.xml` | xmlstarlet sel -t -m "//enclosure[1]" -v "@url" -n | head -n 1` | ssh -t [user]@[host] "mpg123 -"

denzuko · 2010-07-30 23:20:50 3
Play a podcast via XPath and mpg123

Gets the latest podcast show from from your favorite Podcast. Uses curl and xmlstarlet. Make sure you change out the items between brackets.
This is sample output - yours may be different.
0

curl -L -s `curl -s [http://podcast.com/show.rss]` | xmlstarlet sel -t -m "//enclosure[1]" -v "@url" -n | head -n 1` | ssh -t [user]@[host] "mpg123 -"

denzuko · 2010-07-31 00:17:47 3
Random mrxvt background

Simple way of having random mrxvt backgrounds. Add this to your bashrc and change the path names for the pictures.
This is sample output - yours may be different.
0

LIST="/some/pic/file /another/picture /one/more/pic"; PIC=$(echo $LIST | sed s/"\ "/"\n"/g | shuf | head -1 | sed s/'\/'/'\\\/'/g ); sed -i s/Mrxvt.Pixmap:.*/"Mrxvt.Pixmap:\t$PIC"/ ~/.mrxvtrc

dog · 2010-08-23 10:17:42 3
Get the latest Geek and Poke comic
This is sample output - yours may be different.
0

wget -q $(lynx --dump 'http://geekandpoke.typepad.com/' | grep '\/.a\/' | grep '\-pi' | head -n 1 | awk '{print $2}') -O geekandpoke.jpg

tersmitten · 2010-09-07 12:15:36 3
Get the amount of users currently registered at the DudaLibre.com Linux Counter.
This is sample output - yours may be different.
0

curl --silent http://www.dudalibre.com/gnulinuxcounter?lang=en | grep users | head -2 | tail -1 | sed 's/.*<strong>//g' | sed 's/<\/strong>.*//g'

hunterm · 2010-10-07 04:12:45 3
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Find the 20 biggest directories on the current filesystem

This command will tell you the 20 biggest directories starting from your working directory and skips directories on other filesystems. Useful for resolving disk space issues.

display ip address

add this alias in .bashrc to fast check the ip address of your modem router alias myip="curl -s http://myip.dk | grep '' | sed -e 's/]*>//g'"

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

When was your OS installed?

Show time and date when you installed your OS.

Look for English words in /dev/urandom

Little faster alternative.

Convert from octal format to umask

Umask is obtained subtracting 7 from each cypher of octal format. I store octal perm format in an array,then for each element of array I subtract 7. The result is the umask.

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"

Clean up display when the bash prompt is displayed

This will cause bash to fix a garbled terminal before the prompt is printed. For example, if you cat a file with nonprintable character sequences, the terminal sometimes ends up in a mode where it only prints line drawing characters. This sequence will return the terminal to the standard character set after every command.

ssh autocomplete

Add to your bash profile to minimize carpal tunnel syndrome. Doesn't work with user@hostname but appending "-l user" works fine if needed. Works for ping as well.. complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ping

Gets directory and files tree listing from a FTP-server

Creates a file with contents like `du -a`, only it is remote server filesystem hierarchy. Very usefull then for grep-ing without remote connection.

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Commands using head (314)

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