$ pwgen --capitalize --numerals --symbols --secure -1 20 10
hU>g{;K"6nSgx}O8kTgs
,_(.zi)34uZ\:GR!m=d{
`%8%]R0E_fAZrb>:uY\e
T76rBO:xMPE)DiDn|d@U
om<lj'_4/]$TCs(C2R%D
H#;,=4u}2umy8Yb;[J"@
aF=80[`jNwmyZLl7=jYt
'A3VULUFI;e|#B[{O/r`
!xPP|{7t?;};jS8gc&Y\
Z7'2Kt1V{z_\ow.\47?;
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/