$ pwgen --capitalize --numerals --symbols --secure -1 20 10
mU~ky%*VGD.W*9p8!3^,
ti?FVyc1PEAB{,EX743V
ou"<j0inw1WF98a37yn4
3!a/AOT*<!W9QXhwj&ZS
@g1n{HAIa&1nwyW7Tnr:
L&"de_LaZ^yo2.2z!=Z#
\5yE\0V:`M-ca<XN^mFQ
#BpwYjg}34%FqH]Iw+?u
x'HWy;nMxt.G!b0#J_M>
P9X#^4.1,Lxc1HWjV/Jn
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/