$ pwgen --capitalize --numerals --symbols --secure -1 20 10
3N$3w|$w!lr;XmW(%s{0
j_vNTP);FBK$nD3e)VI&
Ob5A!3Qh,PIC:b`_#RK?
`q1#1~oiB,:r0PcEj*w}
%WtcQTu>g7|C:j9{-x<z
iqM[u6^n(;Q>;[T[|-C;
FB8[`wk"QTAImoybr@Lr
pOebEPtK0iL!{I|V~6UB
4Tf*/{R?\>rCk]=B@A}#
"i9/\c32W@hs;66@$76N
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/