$ pwgen --capitalize --numerals --symbols --secure -1 20 10
o;8xWNFwOF%$wonavm_r
yRpE8o,hm+ujeOq6x#N\
|ufi,YZXj3%BNcNsJ_03
FM6QJt3)kb)*3hk\/v*Z
cSlILqJ:`_?(P~51:^zf
rY/3)>'8B&gSd0Ne0+sM
$uu&|<jT-mQ/+dr2GXVs
RYyOOlo"QB)3s"=+[0;x
o:Bel%9s}dQCd~Aj87pF
87lZqQusuQ,1w,/Wd+/-
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/