$ pwgen --capitalize --numerals --symbols --secure -1 20 10
)n!D5syk\NIv)vnGw2yQ
1vypIFLvI-K+TM4HqnfJ
03g8^@WL321e>xaflC%y
cjcchFLdah[|1&m+PnHL
\q>)l02/(Aa-(,#&UY+L
3+G_s'^p1O^Z.to3oBt+
+YR%h49S!%_c(Y!|gjS;
g1Nt1:h'u,>hjX'9@ofK
^!1Pa<[,yKx:eMYzg3Qx
4&kx~tmc+=i(M_G$iX.R
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/