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 20
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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Show numerical values for each of the 256 colors in bash

Same as http://www.commandlinefu.com/commands/view/5876, but for bash. This will show a numerical value for each of the 256 colors in bash. Everything in the command is a bash builtin, so it should run on any platform where bash is installed. Prints one color per line. If someone is interested in formatting the output, paste the alternative.

back ssh from firewalled hosts

host B (you) redirects a modem port (62220) to his local ssh. host A is a remote machine (the ones that issues the ssh cmd). once connected port 5497 is in listening mode on host B. host B just do a ssh 127.0.0.1 -p 5497 -l user and reaches the remote host'ssh. This can be used also for vnc and so on.

Network Proxy to dump the application level forward traffic in plain text in the console and in a file.

If you have a client that connects to a server via plain text protocol such as HTTP or FTP, with this command you can monitor the messages that the client sends to the server. Application level text stream will be dumped on the command line as well as saved in a file called proxy.txt. You have to change 8080 to the local port where you want your client to connect to. Change also 192.168.0.1 to the IP address of the destination server and 80 to the port of the destination server. Then simply point your client to localhost 8080 (or whatever you changed it to). The traffic will be redirected to host 192.168.0.1 on port 80 (or whatever you changed them to). Any requests from the client to the server will be dumped on the console as well as in the file "proxy.txt". Unfortunately the responses from the server will not be dumped.

Test your bash skills.

Ctrl+S Ctrl+Q terminal output lock and unlock

These are simple shortcuts to pause and continue terminal output, works in most terminals and screen multiplexers like screen. You can use it to catch something if things change too fast, and scroll with Shift + PgUp PgDown. On linux console ScrollLock can also be used.

premiumize - create a ddl & save the URL in variable MYLINK

Start screen with name and run command

Runs an instance of screen with name of "name_me" and command of "echo "hi"" To reconnect to screen instance later use: screen -r name_me

output your microphone to a remote computer's speaker

Run a command on a remote machine

This counts the number of httpd processes running.

Prevent shell autologout

Unset TMOUT or set it to 0 in order to prevent shell autologout. TMOUT is the number of seconds after which the present shell will be killed if it has been idle for that long.

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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

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Commands using head (314)

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