$ pwgen --capitalize --numerals --symbols --secure -1 20 10
5G]a1D$1u6lG/}75]rNZ
Vj]o<EHmq0fTt,c-~wA6
&V=N|Ve3rj~'n9k8\AKz
3[Eu,X|pw)I$;c4.QdTN
`%okg7s9>8tMI:0=pIh*
W1tX"JGB"!p0'\s9eK?k
HU7arF6CiIMsL{A6ifeq
Ew:vU,[Tb=EuRp8V$gT;
e!!5GZpl$4hvJX2f<7uc
UViz3y.O/SMzjU^L?T3|
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/