$ pwgen --capitalize --numerals --symbols --secure -1 20 10
#h0AQQ~:Az&BXA\*}Y>f
r5TvHhHM67$DLb#D/~?.
zdA%!Sl}^/_BZn2C$>zt
~qa$%0uEq0Hq?Ik1g/_I
~poiOHcQ%=NpYMHFV#Z3
I<Bk4i<_MDq4g`8I[E.m
#2u/]US27`$TPEW%`JmX
e1Is1RR]%b8N/oVqi["^
yaeS{"9XrbFZmw3[(\#>
!w80K?1c2p<^,^}h1*<2
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/