$ pwgen --capitalize --numerals --symbols --secure -1 20 10
4jV7&IV>r-*j,(yL%[-X
aAEJO21|=u1='x=vao+Y
g?th~h&^?H4;n*'RQ~`%
|>3kYzPIs1ncfI0ZFNAA
YD!oyW&%H3~B;|!f_,8u
"|AFM)?1H>[lOpioZ/vS
a$:@\+RZUZQULE)?3)^t
L)Z`{R-x1Y`\XI5387x]
,kr{z,oAcAB'VB6[{3%J
f"q30ce]4&J2id@5jv`5
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/