$ pwgen --capitalize --numerals --symbols --secure -1 20 10
PU\KpIoa}oIG3X->!WW@
O3JRLOOGhWf^/8\aD-,;
3}eW\5%E43Eh}g6s~fMB
y&Yq'u(6/DN[=+U^ALh4
)D,^L]Y1'G)J^rb0>n8K
Nj>C2xe3]5VHaOCk'C\A
I;#3(;nwEo5tGbALKN<(
C}P8{4UENKm@,7g_z^u=
c@:f^B\k)'z2MsEm-GcD
dhiF{woJuFf"Yl\<2,=O
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/