$ pwgen --capitalize --numerals --symbols --secure -1 20 10
Sj6^:]MpZWL)S@})sgwu
pI`u5Lu6A=,R-E\{B%,T
087cYe-H+q6tlK"w?x3!
a+!qOT17&.n9F$3q557U
`?X..X9nOAz<+9D>+K=G
5s##z3^L&[m'`EPO_=]a
#Gl]A7"`g`ltOj%U~8|/
MN1ZU!|bbkEUiCG[<aWM
OXa=vKRppZ\a,b^8^J@z
aG$4Hc`6_s?hQTXA^dP=
Usage: pwgen [ OPTIONS ] [ pw_length ] [ num_pw ]
Options supported by pwgen:
-c or --capitalize
Include at least one capital letter in the password
-A or --no-capitalize
Don't include capital letters in the password
-n or --numerals
Include at least one number in the password
-0 or --no-numerals
Don't include numbers in the password
-y or --symbols
Include at least one special symbol in the password
-r <chars> or --remove-chars=<chars>
Remove characters from the set of characters to generate passwords
-s or --secure
Generate completely random passwords
-B or --ambiguous
Don't include ambiguous characters in the password
-h or --help
Print a help message
-H or --sha1=path/to/file[#seed]
Use sha1 hash of given file as a (not so) random generator
-C
Print the generated passwords in columns
-1
Don't print the generated passwords in columns
-v or --no-vowels
Do not use any vowels so as to avoid accidental nasty words
https://sourceforge.net/projects/pwgen/