$ pwgen --capitalize --numerals --symbols --secure -1 20 10
`KgE\=O:5EI;(J)H@QEE
zE/pBh]Mwv!KA{O0!(_w
b8D{]eUwnK>iAJ@3zb#z
eATULP`M+T!a|fG;=]v7
8y&|UfZ5x"FB9/5[UO[*
S:n\>WR_s~Se8VncM_\s
v`?,+jo;TurQ8_dJc!-n
?EnQA1??ONxSGd@i-p+U
'?4H9"?8K1e<zQPU)FA4
TQ:\&uh65;+z/gAyTPPb
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/