$ pwgen --capitalize --numerals --symbols --secure -1 20 10
Z2%j+M7/e0UW5I,1BBxZ
'(3{\dsj(4#~*zO")eSb
au4p6-?Hj9#E;_5EhLFl
T1hH2m)LYzM-ytK&IBBO
.%f@[3r^RtTMIEN;o-f}
,R}YF^e:Fh#l7hSF;zv;
u3U4d^583sLVsvy2w5{>
H82B,wnDmq6S+ZH[.n]p
Aqfs\q2XH<TlB]wQ;XH&
edKF'[K.-q\r^Rk0TisC
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/