$ pwgen --capitalize --numerals --symbols --secure -1 20 10
-q/.r5Z~<c*NpaF)w/+}
2|,sO5X1<,4R.:Gazslv
16JGYg`kCLseQ$|#D#S%
L`og6R[f}PLs526UUWtV
HuwIQ/et+"Ef;Te-:N6Y
qW+`fPVGX%4z/Nu`:%BO
fs3%9A>:{CAlfg}'UJSM
Qc/'>ggEV@a1L$TCM`pD
#uA55T@lZLWr6<s#kh,E
N8G!Va}ZS?tqH)g>q8?h
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/