$ pwgen --capitalize --numerals --symbols --secure -1 20 10
MfWz"8/#zNR[E^APSB[K
f3vj;x4/l%.9mkbO!Vt>
}xg6bXb9PuIM&[[B_?dp
Jc^r:`C2K>v3.JG&4;IU
%H9(pj~c0pJ7h4sE^n!E
EZq_8tGU=m8h`IM'%@MP
C>7UOzQTC%xAWCW*hK)f
[PZTodt=S2r2^bAtqB=A
q@88GU94J,.~G[.#a9vA
,E,N3,8_Mr9<&2#eU9lc
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/