$ pwgen --capitalize --numerals --symbols --secure -1 20 10
=1~jn2c']~B:5tEBwS{a
TYQsigrTrJ&4~Xgk30%)
cqW?N/A"E}.[~C1"mD2`
vQ?ayX\1^*fG:'JM8!~y
/Ge7;|JND8E(=~z%WDRg
!_1CHoT%m)9/s0Z[j<v+
~jO:Q1mT*ySE^a!k*s*$
dwF){;4dfi`2?S,Po2Ru
@j2v9h1jjg;s0x?<^QPj
*WMQ|5v_?tvW>6r.H<%R
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/