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 17:47:26 337

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 18:57:34 391
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 08:18:58 125
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 17:12:05 417
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 4
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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Take screenshot through SSH

Of course it requires import command, from imagemagick tools, but it's simpler to type, and imagemagick is usefull anyway.

Fulltext search in multiple OCR'd pdfs

Backup (archive) your Gmail IMAP folders.

Copies an entire hierarchy of mailboxes from the named POP3/IMAP/etc. source to the named destination. Mailboxes are created on the destination as needed. NOTE: The 'mailutil' is Washington's University 'mailutil' (apt-get install uw-mailutils). More examples $ mailutil transfer {imap.gmail.com/ssl/user=you@gmail.com}INBOX Gmail/ ; mailutil check imap.gmail.com/ssl/user=you@gmail.com}\[Gmail\]/Spam If you use the utility in the first, append -v|-d flag(s) to the end the commands above (man mailutil).

resize all JPG images in folder and create new images (w/o overwriting)

Convert all jpegs in the current directory into ~1024*768 pixels and ~ 150 KBytes jpegs

Find the package that installed a command

Execute a command, convert output to .png file, upload file to imgur.com, then returning the address of the .png.

My key is the anonymous one, is good for 50 post an hour with a maximun number of uploads a day, probably will run out, if that happend you can get a free key at the site.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Submit command & rewrite orginal command

Similar to entering a command, but will not erase the command from the command line. Basically a shortcut from entering command, then pushing the up arrow key.

Rename files in batch

host - DNS lookup utility

host is a simple utility for performing DNS lookups. It is normally used to convert names to IP addresses and vice versa. When no arguments or options are given, host prints a short summary of its command line arguments and options.

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Commands using head (314)

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