$ pwgen --capitalize --numerals --symbols --secure -1 20 10
eKfDO~7X%JmqSKv*q*)L
s("^&Id!>wcD9l\"jea%
qKX`IU-9]R*i}FjivQzo
YI|%jwj|VCC@_/18L@<W
rjZajYX\wu3VDt$D|QoB
HH=lZ!'JQ%ux#3-+(-`m
j2tc,Je=8rBp#ak<8nk0
~x\3M7!iI{Ha%p]3JoY6
Q0nz/AH0\Vfs/u='P#EP
F&QDy]oR\&9q5~M;S9>Z
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/