$ pwgen --capitalize --numerals --symbols --secure -1 20 10
jz%0E2l~:Jdd#6?Xj~T(
-nE[u9?>`NX_Pc254KqR
~j{k2m_L+1.J@.Q-^l~"
,jfbIk3Sx&0z_9l."edc
MJEtnHxjf=>J31:g$@:T
X'c,4yCHAus1w?HTIi?[
<B7O{!c9f&['"3(kEO@J
p0.x'r;@Tz_41Uub6GX/
Vsy1^nY]t{F^[@pEik<T
D7G9^\7h(S^U_'96*3"o
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/