$ pwgen --capitalize --numerals --symbols --secure -1 20 10
N:\K6g5kRoIfi!Qk<Q*1
z{@TO0"SE0P,QG|1G{<|
Op\)G;4Y{iHM_mY<fA|:
U$7(bWHT&|/Z}=fD]2>d
47geUFliR!5y*D6iVJ%K
?'fL\-1Ani80:VzFe+#b
j@Rg\#rNqGJqY6]q(*km
CETg5qp;[]xQfj-]6n>v
0*QWT.;?P%yM4\9pOR,"
6YC`9sqq}8n4lTKA@p?[
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/