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 15
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 03:41:14 224
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 01:04:45 248
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 37
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 13:39:17 160
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 36
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 5
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 4
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 3
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 3
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 4
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 7
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 6
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
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 8
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 21
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 18:57:34 391
< 1 2 3 4 5 >

What's this?

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Recursive Ownership Change

Changing files ownership in a directory recursivley from a user to another

List only the directories

-d: list directory entries instead of contents, and do not dereference symbolic links

summarize a list of IP addresses, verifying IP address and giving counts for each IP found

Working with lists of IP addresses it is sometimes useful to summarize a count of how many times an IP address appears in the file. This example, summarizeIP, uses another function "verifyIP" previously defined in commandlinefu.com to ensure only valid IP addresses get counted. The summary list is presented in count order starting with highest count.

Install pip with Proxy

Installs pip packages defining a proxy

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" }

Print github url for the current url

Works for repos cloned via ssh or https.

Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

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

Unrar multiple directories into current working directory

Grabs all rar files in any current subdirectories and feeds it to unrar. Doesn't work well with things packaged like file.part01.rar. Works best with File.rar. You can recurse into other directories by adding more /*'s

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)

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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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