$ pwgen --capitalize --numerals --symbols --secure -1 20 10
RA?aH|R5MzB"SrV3GA]P
euPK47p'eN[9%$0y7;u9
,Fu[&;N[9{l$%]\D3g7#
y(5-\Fl0%JL5YBrMM}aT
=V,f'B2#70,Nc1>$C%?/
/{n6sFq[Lrr[C1wt!)%E
pZA!t?KDYM!(\0'3#b@t
R.du<-@!#(5C~~XrtI_0
ZQt='2X}eUyo\D95cj//
Cw_;'l#`9C._^W=SwHf$
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/