$ pwgen --capitalize --numerals --symbols --secure -1 20 10
;Yy>L]Ob;~7$M_Dj^PxX
$So\jg%z"I^p88-S,T8C
7xXJe,b6Q9k_s:&/GF&Z
G1_A,TwPc-&Y1okgTc)n
B:N97NxJPb>W|qj,Fgu=
%5qkQl\+J>O@+mO!Jw\v
K\[ZFOC_Lc7YF\0@8y"!
'_p$KGx6G=yIPOWP@EW,
_v/GhI5h.x(ZW0Ec^r||
@s#2p`W}kR-=zW'D!5gc
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/