Commands using head sorted by votes

Commands using head (314)

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Find the 10 users that take up the most disk space

In OSX you would have to make sure that you "sudo -s" your way to happiness since it will give a few "Permission denied" errors before finally spitting out the results. In OSX the directory structure has to start with the "Users" Directory then it will recursively perform the operation. Your Lord and master, Mematron Show Sample Output
This is sample output - yours may be different.
```
19234	/Users/mematron
3	/Users/Shared
1	/Users/n00b
1	/Users/fignewton
1	/Users/spam
0	/Users/akira
```
1

sudo -s du -sm /Users/* | sort -nr | head -n 10

mematron · 2012-09-13 10:15:23 4
True Random Dice Roll
This is sample output - yours may be different.
1

echo $(</dev/urandom tr -dc 1-6 | head -c1)

unixmonkey40000 · 2012-09-21 08:38:51 7
Generate a 18 character password, print the password and sha512 salted hash

Generate a 18 character password from character set a-zA-Z0-9 from /dev/urandom, pipe the output to Python which prints the password on standard out and in crypt sha512 form. Show Sample Output
This is sample output - yours may be different.
```
NH6wAL58sKSkqBNUwK
$6$6ZpaL7bakRyXzrpM$TVS4d217.BDjKLEnYkPBtpR8CwXes5HI6U2pcSEoB3x9xUbXVxacEhvlvKFCi4tftwxOJs.Comh7u.GiPvA6X1
```
1

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 18 | head -1 | python -c "import sys,crypt; stdin=sys.stdin.readline().rstrip('\n'); print stdin;print crypt.crypt(stdin)"

cnyg · 2012-11-09 00:40:22 4
generate 30 x 30 matrix

Replaces hexdump with the more succint xxd, and the sed was unnecessarily complex.
This is sample output - yours may be different.
1

xxd -p /dev/urandom |fold -60|head -30|sed 's/$..$/\1 /g'

psifertex · 2013-02-19 22:18:52 4
Generate password
This is sample output - yours may be different.
1

tr -dc 'A-Za-z0-9!@#$%^&*' < /dev/urandom | fold -w 12 | head -n 1

opexxx · 2013-03-15 13:20:32 81

Display 16 largest installed RPMs in size order, largest first

Interesting to see which packages are larger than the kernel package. Useful to understand which RPMs might be candidates to remove if drive space is restricted. Show Sample Output

rpm -qa --queryformat '%{size} %{name}-%{version}-%{release}\n' | sort -k 1,1 -rn | nl | head -16

mpb · 2013-03-19 21:10:54 6

most used unix commands
This is sample output - yours may be different.
1

awk '{print $1}' ~/.bash_history | sort | uniq -c | sort -rn | head -n 10

nesses · 2013-05-03 16:24:30 6
Get IP address from domain

I'm not sure how reliable this command is, but it works for my needs. Here's also a variant using grep. nslookup www.example.com | grep "^Address: " | awk '{print $2}' Show Sample Output
This is sample output - yours may be different.
```
123.123.123.123
```
1

nslookup www.example.com | tail -2 | head -1 | awk '{print $2}'

wsams · 2013-09-05 20:26:45 11

Prints the latest modified files in a directory tree recursively

Sorts by latest modified files by looking to current directory and all subdirectories Show Sample Output

find . -name '*pdf*' -print0 | xargs -0 ls -lt | head -20

fuats · 2013-10-03 21:58:51 9

Create a bunch of dummy text files
This is sample output - yours may be different.
1

for i in `seq 1 4096`; do tr -dc A-Za-z0-9 </dev/urandom | head -c8192 > dummy$i.rnd; done

BoxingOctopus · 2013-11-11 21:27:15 8
Create a bunch of dummy text files

Using the 'time' command, running this with 'tr' took 28 seconds (and change) each time but using base64 only took 8 seconds (and change). If the file doesn't have to be viewable, pulling straight from urandom with head only took 6 seconds (and change)
This is sample output - yours may be different.
1

for i in {1..4096}; do base64 /dev/urandom | head -c 8192 > dummy$i.rnd ; done

pdxdoughnut · 2013-11-12 00:36:10 9
Download latest NVIDIA Geforce x64 Windows driver

Download latest NVIDIA Geforce x64 Windows7-8 driver from Nvidia's website. Pulls the latest download version (which includes beta). This is the "English" version. The following command includes a 'sed' line to replace "english" with "international" if needed. You can also replace the starting subdomain with "eu." "uk." and others. Enjoy this one liner! 1 character under the max :) wget "us.download.nvidia.com$(wget -qO- "$(wget -qO- "nvidia.com/Download/processFind.aspx?psid=95&pfid=695&osid=19&lid=1&lang=en-us" | awk '/driverResults.aspx/ {print $4}' | cut -d "'" -f2 | head -n 1)" | awk '/url=/ {print $2}' | sed -e "s/english/international/" | cut -d '=' -f3 | cut -d '&' -f1)" Show Sample Output
This is sample output - yours may be different.
```
HTTP request sent, awaiting response... 200 OK
Length: 211183464 (201M) [application/octet-stream]
Saving to: ?331.82-desktop-win8-win7-winvista-64bit-english-whql.exe?
```
1

wget "us.download.nvidia.com$(wget -qO- "$(wget -qO- "nvidia.com/Download/processFind.aspx?psid=95&pfid=695&osid=19&lid=1&lang=en-us"|awk '/driverResults.aspx/ {print $4}'|cut -d "'" -f2|head -n 1)"|awk '/url=/ {print $2}'|cut -d '=' -f3|cut -d '&' -f1)"

lowjax · 2013-11-21 03:04:59 11
Find last reboot time

Specific to OSX. Show Sample Output
This is sample output - yours may be different.
```
kern.boottime = Wed Jan 22 00:41:33 2014
```
1

sysctl -a | grep boottime | head -n 1

lgarron · 2014-01-24 13:03:48 7
Find 10 largest files in git history
This is sample output - yours may be different.
1

git verify-pack -v .git/objects/pack/pack-*.idx | grep blob | sort -k3nr | head | while read s x b x; do git rev-list --all --objects | grep $s | awk '{print "'"$b"'",$0;}'; done

qdrizh · 2014-06-25 07:37:24 6
Print the IP address and the Mac address in the same line

Print the IP address and the Mac address in the same line Show Sample Output
This is sample output - yours may be different.
```
mac:00:50:12:BD:5E:5B - adr:192.168.0.1
```
1

ifconfig | head -n 2 | tr -d '\n' | sed -n 's/.*$00:[^ ]*$.*$adr:[^ ]*$.*/mac:\1 - \2/p'

Koobiac · 2014-09-03 14:35:27 18

Top 30 History

Top 30 History Command line with histogram display Show Sample Output

history|awk '{print $2}'|sort|uniq -c|sort -rn|head -30|awk '!max{max=$1;}{r="";i=s=100*$1/max;while(i-->0)r=r"#";printf "%50s %5d %s %s",$2,$1,r,"\n";}'

injez · 2014-09-29 12:40:43 9

Monitor system load and print out top offending processes

This checks the system load every second and if it's over a certain threshold (.8 in this example), it spits out the date, system loads and top 4 processes sorted by CPU. Additionally, the \a in the first echo creates an audible bell.
This is sample output - yours may be different.
1

while sleep 1; do if [ $(echo "$(cat /proc/loadavg | cut -d' ' -f1) > .8 " | bc) -gt 0 ]; then echo -e "\n\a"$(date)" \e[5m"$(cat /proc/loadavg)"\e[0m"; ps aux --sort=-%cpu|head -n 5; fi; done

tyzbit · 2014-12-08 15:44:40 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
```
1

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

binaryten · 2015-02-04 19:35:16 11
Most used commands from history (without perl)

I copied this (let's be honest) somewhere on internet and I just made it as a function ready to be used as alias. It shows the 10 most used commands from history. This seems to be just another "most used commands from history", but hey.. this is a function!!! :D Show Sample Output
This is sample output - yours may be different.
```
$ mosth
     1  86  8.6%  rpm
     2  64  6.4%  yum
     3  47  4.7%  echo
     4  36  3.6%  ip
     5  36  3.6%  cat
     6  35  3.5%  ls
     7  32  3.2%  cd
     8  27  2.7%  systemctl
     9  27  2.7%  journalctl
    10  25  2.5%  nano
```
1

mosth() { history | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl | head -n10; }

nnsense · 2015-05-11 17:41:55 19
Printout a list of field numbers (awk index) from a CSV file with headers as first line.

Useful to identify the field number in big CSV files with large number of fields. The index is the reference to use in processing with commands like 'cut' or 'awk' involved. Show Sample Output
This is sample output - yours may be different.
```
$ cat file.csv
ID, EMPLOYEE, AGE, SALARY
2,Jack Sparrow,41,10000
3,Mr. Bean,55,12900
15,Kermit the frog,25,29300

$ head -1 file.csv | tr ',' '\n' | tr -d " " | awk '{print NR,$0}'
1 ID
2 EMPLOYEE
3 AGE
4 SALARY
```
1

head -1 file.csv | tr ',' '\n' | tr -d " " | awk '{print NR,$0}'

neomefistox · 2015-08-26 05:46:15 18
Grab the top 5 CLFUContest one-liners
This is sample output - yours may be different.
1

curl -sL http://goo.gl/3sA3iW | head -16 | tail -14

cadejscroggins · 2015-09-19 07:19:49 10
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 Show Sample Output
This is sample output - yours may be different.
```
export AWS_ACCESS_KEY_ID="ASIAasdfghjkl"
export AWS_SECRET_ACCESS_KEY="Fasdfghjklasdfghjklasdfghjkl"
export AWS_SESSION_TOKEN="FasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjklFasdfghjklasdfghjklasdfghjkl+N1riOr0d/4egdx9BOgPvaxuVPc5ouPw2vdD2qg"
```
1

head -n1 | xargs -I {} aws sts get-session-token --serial-number $MFA_ID --duration-seconds 900 --token-code {} --output text --query [Credentials.AccessKeyId,Credentials.SecretAccessKey,Credentials.SessionToken]

keymon · 2016-04-12 10:57:00 46
Find top 10 largest files
This is sample output - yours may be different.
1

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

zluyuer · 2016-05-27 04:05:08 12
Read random news on the internet

sort -R randomize the list. head -n1 takes the first.
This is sample output - yours may be different.
1

links `lynx -dump -listonly "http://news.google.com" | grep -Eo "(http|https)://[a-zA-Z0-9./?=_-]*" | grep -v "google.com" | sort -R | uniq | head -n1`

mogoh · 2016-07-26 12:54:53 15
Find last 50 modified files
This is sample output - yours may be different.
1

find / -path /proc -prune -o -type f -printf '%TY-%Tm-%Td %TT %p\n' | sort -r | head -50

sidneycrestani · 2016-11-20 02:45:01 13
‹ First < 3 4 5 6 7 > Last ›

What's this?

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Easy way to scroll up und down to change to one of n last visited directories.

This alias is meant to append n (here is n=10) most recently used cd commands to the bottom of history file. This way you can easily change to one of previous visited directories simply by hitting 1-10 times arrow up key. Hint: You can make more aliases implying the same rule for any set of frequently used long and complex commands like: mkisof, rdesktop, gpg...

renames multiple files that match the pattern

Useful when you want to quickly rename a bunch of files.

Monitor memory usage

Monitor with watch command and vmstat, memory usage

Auto-log commands

A quick alias I use right before logging into a server so that I have a log of the transactions as well as the ability to re-connect from another computer. Useful for when your boss says "what commands did you run again on that server?" and you had already closed the terminal ;) I wrapped it in a script now, with more features, but this is the heart of it. Never leave home without it.

Start dd and show progress every X seconds

Adjust "sleep X" to your needs. *NOTE: First sleep is required because bash doesn't have a "post-test" syntax (do XXX while).

Find all dot files and directories

force a rescan on a host of scsi devices (useful for adding partitions to vmware on the fly)

Shows how many percents of all avaliable packages are installed in your gentoo system

Google text-to-speech in local language or language of choice

Google text-to-speech in your local language or in language of choice via country code switch (ISO 639-1).

grep -v with multiple patterns.

You can use -e to pass multiple patterns.

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Commands using head (314)

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