Commands using head sorted by votes

Commands using head (314)

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Display a numbered list of 50 biggets files sorted by size (human readable)

du -ah | sort -hr | head -n50 | cat -n

rgregor · 2013-10-01 10:16:13 6

Download current stable kernel version from kernel.org

Access www.kernel.org and download the last stable linux kernel release. Show Sample Output

wget --no-check-certificate https://www.kernel.org/$(wget -qO- --no-check-certificate https://www.kernel.org | grep tar | head -n1 | cut -d\" -f2)

glaudiston · 2013-11-07 18:46:14 8

Generate a random password.

Uses urandom and tr to generate a random password. Change the value of head -c## for the lenght of the password. Show Sample Output
This is sample output - yours may be different.
```
dWl2GEd7RE
```
0

echo $(< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c10)

santizo · 2013-11-07 21:51:38 7
PHPUnit: Show the 5 slowest tests with their runtime
This is sample output - yours may be different.
0

phpunit --log-json php://stdout | awk '$NF ~ '/,/' && $1 ~ /"(test|time)"/' | cut -d: -f2- | sed "N;s/\n/--/" | sed "s/,//"| awk 'BEGIN{FS="--"}; {print $2 $1}' | sort -r | head -n 5

adri · 2014-01-24 12:50:02 6
grep BTC last trading price from BTC-E, but u can change it.. they got em all

Show Sample Output
This is sample output - yours may be different.
```
719.00
```
0

wget -q -O- http://bitinfocharts.com/markets/btc-e/btc-usd.html |grep -o -P 'lastTrade">([0-9]{1,})(.){0,1}[0-9]{0,}' |grep -o -P '(\d)+(\.){0,1}(\d)*' |head -n 1

peter1337 · 2014-01-25 23:40:00 21
16 Character Random Password

This snippet will produce an alpha-numeric 16 character password Show Sample Output
This is sample output - yours may be different.
```
sll_IBZS8dL4H8bQ
```
0

< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;

opexxx · 2014-04-07 10:07:22 7
Return the one-liner google response for queries like "12*24" or "what time is it in the uk"
This is sample output - yours may be different.
0

google() { Q="$@"; GOOG_URL='https://www.google.com/search?q='; AGENT="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36" elinks -dump "${GOOG_URL}${Q//\ /+}" | grep "\*" | head -1 }

runvnc · 2014-04-17 07:37:25 5
最常使用的10个命令

最常使用的10个命令 Show Sample Output
This is sample output - yours may be different.
```
142 cd
    100 ll
     98 tail
     76 vi
     70 service
     53 ps
     52 dstat
     44 cat
     41 stat_peek.sh
     30 ifconfig
```
0

history |awk '{print $3}' |awk 'BEGIN {FS="|"} {print $1}'|sort|uniq -c |sort -rn |head -10

cypggs · 2014-04-20 06:40:56 7
Get a PostgreSQL servers version

-t, --tuples-only print rows only Show Sample Output
This is sample output - yours may be different.
```
 PostgreSQL 9.2.5 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8), 64-bit
```
0

psql -h <SERVER NAME HERE> -t -c 'SELECT version();' |head -1

hxre · 2014-04-25 08:26:23 8
Find directories in pwd, get disk usage, sort results
This is sample output - yours may be different.
0

du -a | sort -nr | head -10

compguy925 · 2014-06-10 13:00:27 8
Show an alphabetized list of all mcollective nodes
This is sample output - yours may be different.
0

mco ping | head -n -4 | awk '{print $1}' | sort

mrwulf · 2014-06-24 18:20:16 7
Parse logs for IP addresses and how many hits from each IP

Original command: cat "log" | grep "text to grep" | awk '{print $1}' | sort -n | uniq -c | sort -rn | head -n 100 This is a waste of multiple cats and greps, esp when awk is being used
This is sample output - yours may be different.
0

awk '/text to grep/{print $1}' "log" | sort -n | uniq -c | sort -rn | head -n 100

kln0thing · 2014-07-09 08:48:06 9
Parse logs for IP addresses and how many hits from each IP

Accepts multiple files via logs.... Substitute "text to grep" for your search string. If you want to alias this, you could do something like this: alias parse-logs='awk "/$1/{print \$1}" ${@[@]:1} | sort -n | uniq -c | sort -rn | head -n 100'
This is sample output - yours may be different.
0

awk '/text to grep/{print \$1}' logs... | sort -n | uniq -c | sort -rn | head -n 100

impinball · 2014-07-10 20:36:02 7
A random password generator
This is sample output - yours may be different.
0

tr -dc '\x15-\x7e' < /dev/urandom| head -c 16 | paste

jianingy · 2014-08-19 06:37:15 8
Random unsigned integer from /dev/random (0-65535)
This is sample output - yours may be different.
0

dd if=/dev/random count=1 bs=2 2>/dev/null | od -i | awk '{print $2}' | head -1

DarkIye · 2014-08-25 16:32:54 7

view the 10 most cpu using processes in browser

If you want to see your top ten cpu using processes from the browser (e.g. you don't want to ssh into your server all the time for checking system load) you can run this command and browse to the machines ip on port 8888. For example 192.168.0.100:8888 Show Sample Output

while true; do ps aux | sort -rk 3,3 | head -n 11 | cut -c -120 | netcat -l -p 8888 2>&1 >/dev/null; done &

manumiu · 2014-08-29 07:10:57 8

List open file descriptor count by PID

Useful for when you find the system runs out of file descriptors and you want to know why. Show Sample Output
This is sample output - yours may be different.
```
  32015 java
   2567 Passenger
   1630 ruby
   1470 rtorrent
   1316 ruby
   1014 ruby
    957 python2
    689 ruby
    510 deluged
    337 postgres
```
0

lsof | cut -f 1 -d ' ' | uniq -c | sort -rn | head -n 10

bobobo1618 · 2014-11-12 09:16:19 8
BIGGEST Files in a Directory

Way more easy to understand for naive user. Just returns the biggest file with size.
This is sample output - yours may be different.
0

find . -printf '%s %p\n'|sort -nr| head -1

ranjha · 2014-12-14 15:40:56 8
Incremental copy to remote host
This is sample output - yours may be different.
0

rsync -v --ignore-existing `ls | head -n 40` root@localhost:/location

zluyuer · 2014-12-16 04:08:59 8
BIGGEST Files in a Directory
This is sample output - yours may be different.
0

du -k . | sort -rn | head -11

b0wlninja · 2014-12-29 17:12:25 8
Generate a random alphanumeric string (works on Mac)
This is sample output - yours may be different.
0

cat /dev/urandom | strings | grep -o '[[:alnum:]]' | head -n 15 | tr -d '\n'; echo

rekky · 2015-01-31 23:07:23 8
Find the date of the first commit in a git repository

Finds the date of the first commit in a git repository branch Show Sample Output
This is sample output - yours may be different.
```
Wed Jun 25
```
0

git rev-list --all|tail -n1|xargs git show|grep -v diff|head -n1|cut -f1-3 -d' '

binaryten · 2015-02-04 19:35:18 13
Show first IPv4 address for an interface without CIDR mask

Given a network interface (eth0 in this example), find its ip address, without CIDR netmask. Show Sample Output
This is sample output - yours may be different.
```
localhost core # ip addr show dev eth0 | grep -E '\binet\b' | sed 's|.*inet $[^/]*$/.*|\1|' | head -n 1
192.168.128.197
```
0

ip addr show dev eth0 | grep -E '\binet\b' | sed 's|.*inet $[^/]*$/.*|\1|' | head -n 1

marksheahan · 2015-02-26 19:07:10 8
Find the next free user id in OS X

If you want to create new user accounts in OS X from the command line use this fragment to find the next free user id. In OS X CLI you have to assign the user id yourself Show Sample Output
This is sample output - yours may be different.
```
507
```
0

echo $((1+$( dscl . -list /Users UniqueID| awk '{print $2}' | sort -rn | head -1 )))

alecthegeek · 2015-04-04 01:39:46 9
Top 10 Memory Consuming Processes
This is sample output - yours may be different.
0

ps -auxf | sort -nr -k 4 | head -10

ajoshi83 · 2015-06-19 10:16:08 8
‹ First < 7 8 9 10 11 > Last ›

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Get a metascore from metacritic.com

This will fetch a metascore from metacritic.com. It requires a url from metacritic without the http://www.metacritic.com/ Example: $ metascore games/platforms/wii/supermariogalaxy - $ metascore tv/shows/marriageref - $ metascore video/titles/newmoon Would be cool to use this in some sort of a graph.

Play random music from blip.fm

SSH Auto-login with password

You need to install "sshpass" for this to work. apt-get install sshpass

add a backup (or any other) suffix to a file

Very helpful when you've got complex filenames and needs to change just some small parts of it. Renaming a file called "i-made-a-small-typo-right-here" to "i-made-a-big-typo-right-here": $ mv -vi i-made-a-{small,big}-typo-right-here You could also copy multiple files, edit, remove, process, etc.

Kill processes that have been running for more than a week

Pipe the result of a command to IRC (channel or query)

$ command | my_irc Pipe whatever you want to this function, it will, if everything goes well, be redirected to a channel or a user on an IRC server. Please note that : - I am not responsible of flood excesses you might provoke. - that function does not reply to PINGs from the server. That's the reason why I first write in a temporary file. Indeed, I don't want to wait for inputs while being connected to the server. However, according to the configuration of the server and the length of your file, you may timeout before finishing. - Concerning the server, the variable content must be on the form "irc.server.org 6667" (or any other port). If you want to make some tests, you can also create a fake IRC server on "localhost 55555" by using $ netcat -l -p 55555 - Concerning the target, you can choose a channel (beginning with a '#' like "#chan") or a user (like "user") - The other variables have obvious names.

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

get newest jpg picture in a folder

search the newest *.jpg in the directory an make a copy to newest.jpg. Just change the extension to search other files. This is usefull eg. if your webcam saves all pictures in a folder and you like the put the last one on your homepage. This works even in a directory with 10000 pictures.

Find files with lines that do not match a pattern

This one would be much faster, as it's only one executed command.

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

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Commands using head (314)

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