$ pwgen --capitalize --numerals --symbols --secure -1 20 10
<c&K{8<iZ~ZC0AENgKn1
sV'&>xXGd4kf<bKI7|bB
*Ol(aL0Lpf/(,%PhUNq\
.o_AM[vTa^7]xF4Bq4HI
1=_oF6gcT(<CT=+{O$U8
u1I8D[f.iu[n>yh}M}GZ
'Uv,S=meG5ic3:zEP&{O
y"yMs?4%lI*;&uV{1>-n
4UV(Mhz&gI])p#WT|h;:
G}jd>l\GS;WwF'3G<ci[
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/