Commands using head sorted by votes

Commands using head (314)

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Copying part of the files from one directory to another
This is sample output - yours may be different.
0

find dir1 -maxdepth 1 -type f | head -100000 | xargs mv -t dir2/subdir

rebirther · 2017-04-28 17:30:27 23

Watch all postgres processes, sorted by memory use

Continuously watches postgres, showing the instances using the most RAM at the top. Show Sample Output

watch -n 1 '{ ps aux | head -n 1; ps aux --sort -rss | grep postgres | grep -v grep; } | cat'

carbocation · 2017-05-14 17:01:44 16

Get only headers from a website with curl even if it doesn't support HEAD

Some sites running on basic web servers don't support the HEAD request, so using "curl -I" on them doesn't work. This will automatically try "curl -I" at first and if that fails with a 4xx or 5xx status code, it falls back to "curl -i" and prints only the headers from that.
This is sample output - yours may be different.
0

curlh() { x="$(curl -Is -w '%{http_code}' "$@")"; if [[ "$(tail -n 1 <<< "$x")" == [45]* ]]; then curl -is "$@" | awk '{ if (!NF) { exit }; print }'; else head -n -1 <<< "$x"; fi; }

nyuszika7h · 2017-07-10 12:29:00 17
Download first mp3 file linked in a RSS feed
This is sample output - yours may be different.
0

wget `curl -s <podcast feed URL> | grep -o 'https*://[^"]*mp3' | head -1`

tbon3r · 2017-07-16 23:02:03 25
find the path of biggest used space
This is sample output - yours may be different.
0

du -a / | sort -n -r | head -n 10

aysadk · 2017-08-04 12:34:38 17
Delete first 10 branches from remote origin (exclude master)
This is sample output - yours may be different.
0

git branch -a | grep "remotes/origin" | grep -v master | sed 's/^[ *]*//' | sed 's/remotes\/origin\///' | head -n10 | sed 's/^/git push origin :/' | bash

Trindaz · 2017-12-05 17:30:29 20
check memory and CPU consumption of Process on node.
This is sample output - yours may be different.
0

ps -eo pcpu,pmem,cmd | grep Service| grep -v grep| sort -k 1 -nr | head -5

calicowboy54 · 2018-02-02 17:07:51 23

Print the 16 most recent RPM packages installed in newest to oldest order

Display a list of the 16 most recently installed RPM packages with newest first. Show Sample Output

rpm -qa --queryformat '%{INSTALLTIME} %{name}-%{version}-%{release}\n' | sort -k 1,1 -rn | nl | head -16 | awk '{printf("%3d %s %s\n", $1,strftime("%c",$2),$3)}'

mpb · 2018-09-12 17:47:26 339

Continuous random string of text
This is sample output - yours may be different.
0

while true; do sleep .15; head /dev/urandom | tr -dc A-Za-z0-9; done

allyman17 · 2018-10-10 18:57:34 393
Extract queries from mysql general log

queries related to table 'Invoice_template' Show Sample Output
This is sample output - yours may be different.
0

grep -Eo '( *[^ ]* *){4}Invoice_Template( *[^ ]* *){4}' /mysql-bin-log/mysql-gen.log | head -10000 | sort -u

shantanuo · 2020-02-14 08:18:58 131
Compute newest kernel version from Makefile on Torvalds' git repository

Get newest kernel version by parsing the most bleeding-edge Makefile possible. Useful for doing things like writing live ebuilds and/or self-updating PKGBUILDs for testing purposes. Breakdown: * wget -qO - https://raw.githubusercontent.com/torvalds/linux/master/Makefile — retrieve Makefile and pipe to stdout * head -n5 — only the first 5 lines are relevant, that's where all the version variables are grep -E '\ \=\ [0-9]{1,}' — version variables always have an equals sign followed by a number * cut -d' ' -f3 — extract the individual numbers from the version variables * tr '\n' '.' — replace newlines with periods * sed -e "s/\.$// — remove trailing period Show Sample Output
This is sample output - yours may be different.
```
5.12.0
```
0

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

realkstrawn93 · 2021-04-27 17:12:05 423
removing those pesky malformed lines at the end of a text file..

tells you the number of lines in said file, and then tail the last 100 lines ( or how many are messed up) then u take the total amount of lines and then subract the 100 or so lines u DONT WANT, then do a head -n $new_number and then redirect it to new file.db
This is sample output - yours may be different.
-1

cat -n $file | tail -n 100 && head -n number-of-lines-you-want-to-keep > newfile

bbelt16ag · 2009-02-15 01:02:10 9
remove the last line of all html files in a directory

Some malicious program appends a iframe or script tag to you web pages on some server, use this command to clean them in batch.
This is sample output - yours may be different.
-1

for f in *.html; do head -n -1 $f > temp; cat temp > $f; rm temp; done

Sunng · 2009-10-12 12:49:18 5
generate random password

A slightly shorter version. Also doesn't put a return character at the end of the password
This is sample output - yours may be different.
-1

tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c10

Phil · 2009-12-01 14:22:20 4
List of commands you use most often

This alternative cleans HISTTIMEFORMAT environment variable and calls gnuplot just after /tmp/cmds is closed, to avoid some errors.
This is sample output - yours may be different.
-1

HISTTIMEFORMAT='' history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head > /tmp/cmds ; gnuplot -persist <<<'plot "/tmp/cmds" using 1:xticlabels(2) with boxes'

narcelio · 2010-06-17 17:38:16 3
Print just line 4 from a textfile

using tail first won't do it because tail counts from the bottom of the file. You could do it this way but I don't suggest it
This is sample output - yours may be different.
-1

head -n X | tail -n 1

infinull · 2010-07-08 22:06:39 5
Get the revision number at which the current branch is created.
This is sample output - yours may be different.
-1

svn log --stop-on-copy | grep r[0-9] | awk '{print $1}' | sed "s/r//" | sort -n | head -1

jimthunderbird · 2010-10-07 21:21:20 3
Find the biggest files

Show the top file size in human readable form
This is sample output - yours may be different.
-1

find -type f | xargs -I{} du -s "{}" | sort -rn | head | cut -f2 | xargs -I{} du -sh "{}"

glaudiston · 2011-01-04 11:10:56 3
Fetch current song from last.fm
This is sample output - yours may be different.
-1

curl -s http://www.last.fm/user/$LASTFMUSER | grep -A 1 subjectCell | sed -e 's#<[^>]*>##g' | head -n2 | tail -n1 | sed 's/^[[:space:]]*//g'

sn0opy · 2011-01-24 08:16:48 3
Find artist and title of a music cd, UPC code given (first result only)

Substitute that 724349691704 with an UPC of a CD you have at hand, and (hopefully) this oneliner should return the $Artist - $Title, querying discogs.com. Yes, I know, all that head/tail/grep crap can be improved with a single sed command, feel free to send "patches" :D Enjoy! Show Sample Output
This is sample output - yours may be different.
```
Iron Maiden - Killers
```
-1

wget http://www.discogs.com/search?q=724349691704 -O foobar &> /dev/null ; grep \/release\/ foobar | head -2 | tail -1 | sed -e 's/^<div>.*>$.*$<\/a><\/div>/\1/' ; rm foobar

TetsuyO · 2011-01-30 23:34:54 3
a simple alarm

this command will beep like an alarm for one minute from 18:57. you can change "1857" to your desired time. you should have alsa-oss package installed, and you should also be root or part of "audio" group.
This is sample output - yours may be different.
-1

while true; do while [ `date +%H%M` == "1857" ] ; do sleep 1s; yes | head -n 2000 > /dev/dsp; done; done;

mrwill · 2011-04-23 14:44:26 8
Show seconds since modified of newest modified file in directory
This is sample output - yours may be different.
-1

echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))

depesz · 2011-05-12 14:29:45 3
change dir to n-th dir that you listed

Replace the head -1 with head -n that is the n-th item you want to go to. Replace the head with tail, go to the last dir you listed. You also can change the parameters of ls.
This is sample output - yours may be different.
-1

cd $(ls -ltr|grep ^d|head -1|sed 's:.*\ ::g'|tail -1)

timothyhmchen101 · 2011-08-10 03:39:35 2
Get current stable kernel version string from kernel.org
This is sample output - yours may be different.
-1

curl -s kernel.org | grep '<strong>' | head -3 | tail -1 | cut -d'>' -f3 | cut -d'<' -f1

mdix · 2012-06-15 21:28:42 22
Show git branches by date - useful for showing active branches

simple table
This is sample output - yours may be different.
-1

for k in `git branch -r|awk '{print $1}'`;do echo -e `git show --pretty=format:"%Cgreen%ci_%C(blue)%c r_%Cred%cn_%Creset" $k|head -n 1`$k;done|sort -r|awk -F"_" '{printf("%s %17s %-22s %s\n",$1,$2,$3,$4)}'

varon · 2012-10-29 12:38:24 6
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Parallel mysql dump restore

this command works with one gziped file per table, and restore 4 tables in parallel.

Watch several log files in a single window

It works like a "tail -f" on several files. Use the number keys 0-9 to set a baseline in the numbered window. Pressing "b" let you scroll back in one of the windows.

Colorful man

Colourful with vim regex finding goodness! Replace the 'man' with the page to be looked up. I actually have as a function in my .profile function vman { /usr/bin/man $* | /usr/bin/col -b | /usr/bin/iconv -c | view -c 'set ft=man nomod nolist nospell nonu' -

Validate openssh key & print checksum

Get your public ip

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

Auto download Ubuntu 10.04 LTS with super fast zsync

Need to have rc iso pre-downloaded before running command.

Make vim open in tabs by default (save to .profile)

I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

Add all files not under subversion control

list only directories in reverse order

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Commands using head (314)

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