Commands using head sorted by votes

Commands using head (314)

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Top 10 requestors by IP address from Apache/NCSA Logs
This is sample output - yours may be different.
3

awk '{print $1}' /var/log/httpd/access_log | sort | uniq -c | sort -rnk1 | head -n 10

flip387 · 2009-08-30 15:32:26 3
Produce a pseudo random password with given length in base 64
This is sample output - yours may be different.
3

date +%s | sha256sum | base64 | head -c <length>; echo

markdrago · 2010-04-30 22:05:11 7
Check apache config syntax and restart or edit the file

Checks the apache configuration syntax, if is OK then restart the service otherwise opens the configuration file with VIM on the line where the configuration fails.
This is sample output - yours may be different.
3

( apache2ctl -t && service apache2 restart || (l=$(apache2ctl -t 2>&1|head -n1|sed 's/.*line\s$[0-9]*$.*/\1/'); vim +$l $(locate apache2.conf | head -n1)))

cicatriz · 2010-11-26 18:12:08 78
find an unused unprivileged TCP port

perl-less way
This is sample output - yours may be different.
3

(netstat -atn | awk '{printf "%s\n%s\n", $4, $4}' | grep -oE '[0-9]*$'; seq 32768 61000) | sort -n | uniq -u | head -n 1

depesz · 2010-12-15 09:27:59 3
Provide the ten largest subfolders in the current folder
This is sample output - yours may be different.
3

du -hsx * | sort -rh | head -10

mirams · 2014-04-14 17:54:23 11

Sort processes by CPU Usage

Short list about top 10 processes, sorted by CPU usage Show Sample Output

ps aux | sort -rk 3,3 | head -n 10

x3mboy · 2018-10-29 20:00:36 570

Sort processes by CPU Usage
This is sample output - yours may be different.
3

ps auxk -%cpu | head -n10

rolanda · 2019-06-29 19:17:14 46

Top 10 Memory Processes

It displays the top 10 processes sorted by memory usage Show Sample Output

ps aux | sort -rk 4,4 | head -n 10

x3mboy · 2019-09-26 16:37:33 91

See the top 10 IP addresses in a web access log
This is sample output - yours may be different.
2

# cut -d ' ' -f1 /var/log/nginx/nginx-access.log | sort | uniq -c | sort -nr | head -10 | nl

msisk · 2009-02-07 00:22:11 12
Create passwords and store safely with gpg

Adjust the head -c part for password length. I use filenames like "hans@commandlinefu.com.gpg" and a vim which automatically decrypts files with .gpg suffixes.
This is sample output - yours may be different.
2

tr -dc "a-zA-Z0-9-_\$\?" < /dev/urandom | head -c 10 | gpg -e -r medha@nerdish.de > password.gpg

hans · 2009-02-25 08:48:26 7
Print the last modified file
This is sample output - yours may be different.
2

ls -t1 | head -n1

neW1 · 2009-02-26 09:12:36 9
Display 6 largest installed RPMs sorted by size (descending)

Low on disk space? Check the largest installed RPMs for delete canditates. Show Sample Output
This is sample output - yours may be different.
```
$ rpm -qa --qf '%{SIZE} %{NAME}\n' | sort -nr | nl | head -6 # six largest RPMs
     1	783535706 ibm-notes-editors
     2	396131310 ibm-notes-notesplugin
     3	354961772 clipart-openclipart
     4	238607804 ibm-notes-framework
     5	136072442 openoffice.org-core
     6	117823438 libboost-devel
```
2

rpm -qa --qf '%{SIZE} %{NAME}\n' | sort -nr | nl | head -6 # six largest RPMs

mpb · 2009-03-15 22:18:17 9
copies 20 most recently downloaded mp3 files (such as from Miro) into a directory

Change ~/tmp to the destination directory, such as your mounted media. Change -n20 to whatever number of files to copy. It should quit when media is full. I use this to put my most recently downloaded podcasts onto my phone.
This is sample output - yours may be different.
2

find . -name \*.mp3 -printf "%C+ %h/%f\n" | sort -r | head -n20 | awk '{print "\""$2"\""}' | xargs -I {} cp {} ~/tmp

bkinsey · 2009-05-17 07:06:10 4
Pick a random line from a file
This is sample output - yours may be different.
2

sort -R file.txt | head -1

dfego · 2009-07-23 22:24:52 12
Get table column names from an MySQL-database in comma-seperated form
This is sample output - yours may be different.
2

mysql -u<user> -p<password> -s -e 'DESCRIBE <table>' <database> | tail -n +1 | awk '{ printf($1",")}' | head -c -1

Cowboy · 2009-08-17 12:54:44 3
Print a list of the 30 last modified mp3s sorted by last first
This is sample output - yours may be different.
2

find ~/Music -daystart -mtime -60 -name *mp3 -printf "%T@\t%p\n" | sort -f -r | head -n 30 | cut -f 2

iadbungler · 2009-10-06 17:57:04 3
Outputs a 10-digit random number
This is sample output - yours may be different.
2

head -c4 /dev/urandom | od -N4 -tu4 | sed -ne '1s/.* //p'

opexxx · 2009-10-08 11:27:20 4
Outputs a 10-digit random number
This is sample output - yours may be different.
2

tr -c -d 0-9 < /dev/urandom | head -c 10

hfs · 2009-10-09 11:58:30 3
Blue Matrix

Same as original, but works in bash
This is sample output - yours may be different.
2

while [ 1 -lt 2 ]; do i=0; COL=$((RANDOM%$(tput cols)));ROW=$((RANDOM%$(tput cols)));while [ $i -lt $COL ]; do tput cup $i $ROW;echo -e "\033[1;34m" $(cat /dev/urandom | head -1 | cut -c1-1) 2>/dev/null ; i=$(expr $i + 1); done; done

dave1010 · 2010-05-28 16:07:56 5
Generat a Random MAC address

Just increase the 1 at the end if you want to generate more than one. (Alternative to "| head -n N" you could use the -b flag of od: -b $[6*N] Show Sample Output
This is sample output - yours may be different.
```
ca:41:5d:28:ad:a2
```
2

od /dev/urandom -w6 -tx1 -An|sed -e 's/ //' -e 's/ /:/g'|head -n 1

karel1980 · 2011-05-16 15:05:34 5
cd into the latest directory
This is sample output - yours may be different.
2

alias cd1='cd $( ls -lt | grep ^d | head -1 | cut -b 51- )'

soulonfire · 2011-06-22 11:45:15 12
List top 10 files in filesystem or mount point bigger than 200MB

Specify the size in bytes using the 'c' option for the -size flag. The + sign reads as "bigger than". Then execute du on the list; sort in reverse mode and show the first 10 occurrences. Show Sample Output
This is sample output - yours may be different.
```
675.07  /myfs/sop/infranc/med/20110201/det_med_MOS.txt
393.57  /myfs/sop/inffin/part/20110407/fact_par_201103.accdb
338.03  /myfs/20110501/det_med_MOS.txt
338.02  /myfs/AC/SGE/20110501/EVID.txt
338.00  /myfs/infranc/med/20110601/det_med_EOV.txt
337.96  /myfs/AC/SGE/20110601/EVID.txt
```
2

find /myfs -size +209715200c -exec du -m {} \; |sort -nr |head -10

arlequin · 2011-07-07 21:12:46 3
pretend to be busy in office to enjoy a cup of coffee

combination of several of the above
This is sample output - yours may be different.
2

export GREP_COLOR='1;32';while [ true ]; do head -n 100 /dev/urandom; sleep .1; done | hexdump -C | grep --color=auto "ca fe"

tbaschak · 2012-02-14 19:30:03 3

list the top 15 folders by decreasing size in MB

list the top 15 folders by decreasing size in MB Show Sample Output

du -xB M --max-depth=2 /var | sort -rn | head -n 15

bouktin · 2013-05-23 10:45:21 6

Generate random password on Mac OS X

Feel free to put this in your ~/.profile: random(){ cat /dev/urandom | env LC_CTYPE=C tr -dc $1 | head -c $2; echo; } Then use it to generate passwords: random [:alnum:] 16 Or DNA sequences: random ACGT 256
This is sample output - yours may be different.
2

cat /dev/urandom | env LC_CTYPE=C tr -dc a-zA-Z0-9 | head -c 16; echo

yakovlev · 2014-02-05 15:04:07 6
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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"

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"

Greets the user appropriately

Sort files by size

Resume a detached screen session, resizing to fit the current terminal

By default, screen tries to restore its old window sizes when attaching to resizable terminals. This command is the command-line equivalent to typing ^A F to fit an open screen session to the window.

Rename files in batch

Display usb power mode on all devices

check open ports without netstat or lsof

Output files without comments or empty lines

better integration. works on all Unices works one bash and ksh.

Remove multiple spaces

The command removes all the spaces whithin a file and leaves only one space.

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Commands using head (314)

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