geek@liv-inspiron:~$ pwgen 13 7
Eu7Teadiphaec giepahl3Oyaiy iecoo9Aetaib4 phaiChae6Eivi athoo3igee8Co
Iphu4ufeDeelo aesoYi2lie9he

geek@liv-inspiron:~$ pwgen -s 13 7
eAfycrPlM4cYv 4MRXmZmyIVNBp D8y71iqjG7Zq7 FQRHcserl4R8O yRCUtPtV3dsqV
0vJpp2h0OrgF1 QTp7MKtJyTrjz

geek@liv-inspiron:~$ gpw 7 13
sreepoidahsas
risadiestinge
ntodynesssine
deodstestress
natinglumperm
riasigentspir
enderiferback

head /dev/urandom | tr -dc A-Za-z0-9 | head -c 13 ; echo ''

</dev/urandom tr -dc 'A-Za-z0-9!"#$%&'''()*+,-./:;<=>?@[]^_`{|}~' | head -c 13  ; echo

LC_ALL=C tr -dc 'A-Za-z0-9!"#$%&'''()*+,-./:;<=>?@[]^_`{|}~' </dev/urandom | head -c 13 ; echo

openssl rand -base64 12

openssl rand -hex 12

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1

$ echo $RANDOM | tr '[0-9]' '[a-zA-Z]'
bfeci
$ echo $RANDOM | tr '[0-9]' '[a-zA-Z]'
cijjj

echo $(for((i=1;i<=13;i++)); do printf '%s' "${RANDOM:0:1}"; done) | tr '[0-9]' '[a-zA-Z]'

< /dev/urandom tr -cd "[:print:]" | head -c 32; echo

tr -dc A-Za-z0-9 < /dev/urandom | dd bs=100 count=1 2>/dev/null

LC_ALL=C tr -dc A-Za-z0-9 </dev/urandom | dd bs=100 count=1 2>/dev/null

md5pass [password] [salt]

md5pass word

$1$.MUittVW$j.XDTF1QRnxqFdXRUiSLs0

md5pass word 512

$1$512$.0jcLPQ83jgszaPT8xzds0

shuf --random-source=/dev/urandom --repeat --head-count=20 file_with_characters | tr --delete 'n'

shuf --random-source=/dev/urandom --repeat --head-count=7 file_with_words | tr 'n' ' '

apg -MSNCL -m 5 -x 10

@OpVeyhym9
3:Glul
3DroomIc?
hed&Os0
NefIj%Ob3
35Quok}

shuf -zer -n20  {A..Z} {a..z} {0..9}

musl64 [~]$ secpwgen
USAGE: secpwgen <-p[e] | -A[adhsy] | -r | -s[e]> N

PASSPHRASE of N words from Diceware dictionary
  -p    generate passphrase
  -pe   generate enhanced (with symbols) passphrase

SKEY PASSWORD of N words from S/Key dictionary
  -s    generate passphrase
  -se   generate enhanced (with symbols) passphrase

ASCII RANDOM of N elements (at least one option MUST be present)
  -A    Each letter adds the following random elements in output:
    a    alphanumeric characters
    d    decimal digits
    h    hexadecimal digits
    s    special characters
    y    3-4 letter syllables

RAW RANDOM
  -r    output BASE64 encoded string of N random BITS
  -k    output koremutake encoding of N random BITS

musl64 [~]$ secpwgen -Aas 13
----------------
WK5#*V<]M3<CU ;ENTROPY=67.21 bits
----------------
INFO: destroying random number generator.
INFO: zeroing memory.

musl64 [~]$ secpwgen -Aa 13
----------------
GP0FIEBM9Y3BT ;ENTROPY=67.21 bits
----------------
INFO: destroying random number generator.
INFO: zeroing memory.

musl64 [~]$ secpwgen -p 5
----------------
wq seen list n8 kerr  ;ENTROPY=65.00 bits
----------------
INFO: destroying random number generator.
INFO: zeroing memory.

musl64 [~]$ secpwgen -r 512
----------------
h62lL7G4gwh3/j9c7YteQvVXoqJrQKKPWVR3Lt7az36DcfWZWtUgBT19iwmJBwP4UahNzPe7qYD7OcklUFpCzQ== ;ENTROPY=512.00 bits
----------------
INFO: destroying random number generator.
INFO: zeroing memory.

set="abcdefghijklmonpqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
n=6
rand=""
for i in `seq 1 $n`; do
    char=${set:$RANDOM % ${#set}:1}
    rand+=$char
done
echo $rand

date +%s | sha256sum | base64 | head -c 12