$ pwgen --capitalize --numerals --symbols --secure -1 20 10
rf!?^.U;fyoQlvsN7q/c
h_6N<#C?q_y[<x2fva]"
$nAE/K0mVl^!g!dqcL90
@1qcm0aIw<#O?GiLf282
&:X*>9Z>Z"0yB>6M|-p|
YW(o[dpe>'?#l}[`\+5*
A[6l388t=0IBbg7~`Y!z
<.6-Ps<SMtJ:OWyyNOc\
mY?.0&"{Zj+i&Qb|lLj-
GP8,|,*Fs[X:(irG%M)m
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/