$ pwgen --capitalize --numerals --symbols --secure -1 20 10
xC!s)y1p9T[j-k_,3Z7v
s'$9HJ6u"7nhR<U^#Z$p
9u,~Gr^v!o:D2O{Ogt2j
f!$@j}5*A)4iz/X"hKYL
V&OIa(=jOV'YANM//<]0
2(5WVm0NVk)DlHSh#G,)
H}d("eF^HysOY']6mc7z
iMG8a*HP@9sao;:G{iA'
IU>i>+G:@G2-9;h$cLV'
yq),GOjSTJoW<gf'4f@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/