$ pwgen --capitalize --numerals --symbols --secure -1 20 10
Kz,b808W'IG,<U<Wf\Mq
R9CV1]/9EeJ%>YWXLs;w
]UT@ZoRP~QzT58mpwcq@
TGA>5{%<!6"Nb;V.Bs8J
rG1DQiM*AyD4p#hbF4:O
D&9'HdH*LZWI`b}S}p^g
l/;92#H{F|$oh"VqhV"3
DMs(]t9{p\Y-.+|pX/2K
kZ148l~jz_s\)g-h":!E
>!ISwo#/sqp76SGs6jf*
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/