$ pwgen --capitalize --numerals --symbols --secure -1 20 10
VX=?2;]3"u9P.i1kgf~,
VU:"?~v*,gu{h$2]jLAL
s,qF)95,t"*36D|HL5|y
^yC_).IZ8?Nkb7VTnz^_
1Bx`Q%Jk/10KTD+e=?SQ
Q[0-hvWMR2`g!?eI6hqz
,!e'ZN_:q.e|4FK8*`J/
y_c*BF!Y.nE?d5eAv&{"
{TQSXh6jm{P1z#HgSQsi
["*qk3K9im7rP>G5(Zd]
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/