$ pwgen --capitalize --numerals --symbols --secure -1 20 10
7m'{S|mP.,6])MAXVA2T
!:7,-/_(MbAY&j$9!M]E
EZi}r|p5pbv/X_LK~F~P
eU#O<vI$yc_qDOOi4@@_
q5>MKr,.1}9*p|5cA5#-
4R*rZV72eaa"PR5_ARd\
]t8B}.u(FdaGYl:^f\+^
yfUS1XEAMN<??5Co~sGT
.T{'6*\4rgkm^@!'He,H
ln_j70G%zaw{3o-@(/,l
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/