$ pwgen --capitalize --numerals --symbols --secure -1 20 10
A^ez"sdG2-KCS)Av<FZf
[W#069:q*Hs|c#O{L&n7
9$qH7'AEZr3sP4x0hw/O
+18sB6"RE_f4_6ic2%uN
k+>0ik}Hkiq9(Sw]WW|4
!:NM25?rO1}$R:Q`4'zr
P{[xlV$CMU:/Vxq9fZ6t
;a5j:Wb[M5LPeJZQr*k~
6)h#fVqj1@_m){0Tf)BJ
Rlq9mpsEW.3<iUSNr:YH
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/