Commands tagged random sorted by votes

Commands tagged random (101)

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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 24
Generate Random Text based on Length

Random text of length "$1" without the useless cat command.
This is sample output - yours may be different.
1

genRandomText() { tr -cd '[:alpha:]' < /dev/urandom | head -c "$1"; }

SouthwindCG · 2018-06-05 03:41:14 353
Generate Random Text based on Length
This is sample output - yours may be different.
1

genRandomText() { local n=$1; while [ $((n--)) -gt 0 ]; do printf "\x$(printf %x $((RANDOM % 26 + 65)))" ; done ; echo ; }

ginochen · 2018-06-27 01:04:45 384
generate random mac-address using md5sum + sed

Show Sample Output
This is sample output - yours may be different.
```
$ date | md5sum | sed -r 's/(..){3}/\1:/g;s/\s+-$//'
78:3a:dc:2a:9c:df
```
1

date | md5sum | sed -r 's/(..){3}/\1:/g;s/\s+-$//'

acavagni · 2019-07-13 10:39:21 39
Cryptographically secure 32-bit RNG in strict ZSH

ZSH ships a couple random number generators via the $RANDOM environment variable and rand48() via zsh/mathfunc, but neither are cryptographically secure. This code produces a 32-bit random number suitable for cryptography. It's only dependency is /dev/urandom and it does not rely on any shell commands or 3rd party utilities. It assumes ZSH was compiled with 64-bit integer support. Show Sample Output
This is sample output - yours may be different.
```
1018359216
```
1

srandom() { zmodload zsh/system; local byte; local -i rnd=0; repeat 4; do sysread -s 1 byte || return; rnd=$(( rnd << 8 | #byte )); done < /dev/urandom; print -r -- $rnd; }

atoponce · 2020-12-17 13:39:17 324
Substitution cipher

This is just for fun. Show Sample Output
This is sample output - yours may be different.
```
yOCvVO RBTb
```
0

echo "Decode this"| tr [a-zA-Z] $(echo {a..z} {A..Z}|grep -o .|sort -R|tr -d "\n ")

dennisw · 2009-09-18 06:38:28 38
Outputs a 10-digit random number

Makes use of $RANDOM environment variable.
This is sample output - yours may be different.
0

head -c10 <(echo $RANDOM$RANDOM$RANDOM)

jgc · 2009-10-09 15:09:02 6
command line fu roulette

Splitting on tags in awk is a handy way to parse html.
This is sample output - yours may be different.
0

curl -sL 'www.commandlinefu.com/commands/random' | awk -F'</?[^>]+>' '/"command"/{print $2}'

putnamhill · 2010-08-13 11:42:42 6
Generate Random Text based on Length

Ever need to get some text that is a specific number of characters long? Use this function to easily generate it! Doesn't look pretty, but sure does work for testing purposes! Show Sample Output
This is sample output - yours may be different.
```
[bbbco ~]$ genRandomText 122
onzwxfeknlnvycuccvki dybtrqibdpgl aeclwkfpuxkohucy cqlmpbkwgcqesimxupdkqiymucljhitffb czegujyofidnxnvrkolhmudslpklbjnpmun
[bbbco ~]$ genRandomText 122 | wc -m
122

[bbbco ~]$ genRandomText 27
b bpglferrcsrtveiop umn nq
[bbbco ~]$ genRandomText 27 | wc -m
27
```
0

genRandomText() { a=( a b c d e f g h i j k l m n o p q r s t u v w x y z );f=0;for i in $(seq 1 $(($1-1))); do r=$(($RANDOM%26)); if [ "$f" -eq 1 -a $(($r%$i)) -eq 0 ]; then echo -n " ";f=0;continue; else f=1;fi;echo -n ${a[$r]};done;echo"";}

bbbco · 2012-01-20 21:18:16 5
Generate Random Text based on Length

Using urandom to get random data, deleting non-letters with tr and print the first $1 bytes.
This is sample output - yours may be different.
0

genRandomText() { cat /dev/urandom|tr -dc 'a-zA-Z'|head -c $1 }

thomasba · 2012-01-21 00:51:34 4
Generate Random Text based on Length

Here's my version. It's a bit lengthy but I prefer it since it's all Bash.
This is sample output - yours may be different.
0

genRandomText() { x=({a..z}); for(( i=0; i<$1; i++ )); do printf ${x[$((RANDOM%26))]}; done; printf "\n"; }

uxseven · 2012-01-26 08:19:33 4
Generate random password, human readable with no special characters.
This is sample output - yours may be different.
0

false; while [ $? != 0 ]; do apg -c /dev/urandom -n1 -E oOlL10 | egrep '^[[:alnum:]]+$'; done

evolix · 2012-04-24 08:30:28 5
Generate a random password 30 characters long

Use less random number resources and less commands
This is sample output - yours may be different.
0

head -c 24 /dev/urandom | base64

henix · 2013-09-28 16:32:47 8
Bingo-like raffle

This one is for OS X users: sort -R and shuf aren't available in Lion (10.7.5)
This is sample output - yours may be different.
0

yes 'echo $(( RANDOM%100+1 )); sleep 5' | bash

stx · 2013-11-09 16:22:59 7
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 9
Random Number Between 1 And X

This provides better, but not perfect, distribution, and it works for 2^32 ≤ X ≤ 2^64. (A robust distribution requires iteration/recursion and an indeterminate amount of randomness.)
This is sample output - yours may be different.
0

(od -An -t u8 -N8 </dev/urandom; echo X '* 2 64^/1+p') | dc

imuli · 2015-02-15 19:14:24 9
Generate a directory path based on the date and time

Great for backup / restore scripts. May want to remove the %M/%S to group backups by hour. If using a script, set a variable earlier with the date command, then reference that variable. Otherwise, time will keep on rolling ;-) declare -rx script_start_time="$(date '+./%Y/%m/%d/%H/%M/%S')" mkdir -p "$script_start_time" Show Sample Output
This is sample output - yours may be different.
```
forest@murgatroyd:~/2015/11/21/00/39/56$ pwd
/home/forest/2015/11/21/00/39/56
```
0

mkdir -p "$(date '+./%Y/%m/%d/%H/%M/%S')"

forestb · 2015-09-25 08:56:26 11
Generate File and Checksum with pseudo-random Content and Size in Bash

Create a file with random binary content. Required pv, units packages. It use openssl to encrypt zeros using aes-256 and time stamp as password to generate a pseudo-random file. Show Sample Output
This is sample output - yours may be different.
```
e.g. size=1G will generate 2 file:
1G
1G.md5

You can check file with
md5sum -c 1G.md5
```
0

s=1G bs=16K; count=`units ${s}iB ${bs}iB -1 -t --out="%.f"`; openssl enc -aes-256-ctr -pass pass:`date +%s%N` -nosalt < /dev/zero 2>/dev/null | dd iflag=fullblock bs=$bs count=$count | tee $s | pv -s $s | md5sum | sed -e "s/-/$s/" > ${s}.md5

jcppkkk · 2015-09-30 06:27:39 10
get a random regex match from a file

seed the random number generator, find all matches in a file put all matches from the capture group into an array return a random element from the array Show Sample Output
This is sample output - yours may be different.
```
25
```
0

awk 'BEGIN{srand()} match($0, /DELTA=([0-9]+);/, a) {w[i++]=a[1]} END {print w[int(rand()*i)]}' file.name

jkirchartz · 2015-11-13 17:56:34 11
Password server

This server can be access by a browser or other remote terminal with ncat. I have to use de test && break to allow ctrl-c to close. Show Sample Output
This is sample output - yours may be different.
```
#abGqHf=MM
o_DoB5da`#
```
0

while [ 1 ]; do cat /dev/urandom | tr -dc ' -~' | head -c 10 | ncat -l 8080 &> /dev/null; test $? -gt 128 && break; done

xxjcaxx · 2016-05-04 14:36:47 10
Create some random sounds

This might one day deliver the melody to the next super hit on the radio if played long enough
This is sample output - yours may be different.
0

python -c "import os; print([i * bytearray(os.urandom(10)) for i in bytearray(os.urandom(10000))])" | padsp tee /dev/audio > /dev/null

BigZ · 2016-08-03 20:15:43 25

generate a one-time pad

Piping dd through pv allows to control the size ot the output file and allows for feedback on speed and progress. Sample output is 128 bytes as seen with xxd. See also: http://www.red-bean.com/onetime/#pad-generation Show Sample Output

dd if=/dev/random | pv -ptab --size 128 --stop-at-size | dd of=~/.onetime/to_foo.pad

m4r14n0ju · 2016-10-05 16:14:03 18

generate a one-time pad

Taken from http://www.red-bean.com/onetime/#pad-generation Show Sample Output

dd if=/dev/random of=~/.onetime/to_foo.pad bs=1000 count=1

m4r14n0ju · 2016-10-07 11:31:37 18

get a random command-line-fu tip

You can put this at .bashrc or .profile and get a random tip every time you open a terminal Show Sample Output
This is sample output - yours may be different.
```
# commandlinefu.com - questions/comments: tech@commandlinefu.com

# get a random command-line-fu tip
w3m -dump http://www.commandlinefu.com/commands/random/plaintext

# AD: Diff 2 entire servers at ScriptRock.com
```
0

w3m -dump http://www.commandlinefu.com/commands/random/plaintext

noobcodr · 2017-05-14 02:11:12 22
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 18:57:34 609
< 1 2 3 4 5 >

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See how many % of your memory firefox is using

clear all non-ascii chars of file.txt

Get a brief overview of how many files and directories are installed

To start, you first need to make sure updatedb has been run/updatedb, and initialized the db: $ su -l root -c updatedb This locate command is provided through the mlocate package, installed by default on most GNU/Linux distributions. It's available on the BSDs as well. Not sure about support for proprietary UNIX systems. The output is self-explanatory- it provides an overview of how many directories and files are on your system.

grep apache access.log and list IP's by hits and date - sorted

share internet connection with only one network interface

the below command create a alias for share your internet connection with another. $ifconfig eth0:1 192.168.0.1/24 Its obviously necessary too activate the iptables post-routing and ip forwarding, as root: $modprobe iptable_nat $iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE $echo 1 > /proc/sys/net/ipv4/ip_forward Be sure that the alias 192.168.0.0/24 is not your active real ip range

Verbosely delete files matching specific name pattern, older than 15 days.

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Get full from half remembered commands

Show all commands having the part known by you. Eg: $apropos pdf | less

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Set RGB gamma of secondary monitor

This command first determines whether a second screen is connected. If this is the case, it sets the screen's RGB gamma via xrandr. Useful for cheap or slightly defective monitors with a tint. In this example a yellowing/champagne color deviation is compensated for by decreasing the red and the green portion of the image.

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Commands tagged random (101) the last day the last week the last month all time sorted by date votes

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Commands tagged random (101)

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