If you have a server where you have to generate new passwords daily, the following script can automate the process: #!/usr/bin/perl my @alphanumeric = (‘a’..’z’, ‘A’..’Z’, 0..9); my $randpassword = join ”, map $alphanumeric[rand @alphanumeric], 0..8; print “$passwordgen\n” Run it with ./passwordgen.pl and it will generate random strings of charaters and numerals, 8 characters long:… Read More »
To quickly find out what user accounts you have created in your Linux system, use cut -d: -f1 /etc/passwd | sort This will output the list of usernames from /etc/passwd in a nice and readable way.
You can change the file permissions and ownership, the group and mode of a directory with a single command, using chown. For example, to make a directory called /dir accessible for everyone (RW), set the user joe as the owner of /dir and it’s contents and claim dev as the ownership group, use chown -R… Read More »
To quickly check what group our user is in, we can use the id command. To compress the result in a more easily read output, we can use id -Gn. For example: t4l@laptop:~$ id -Gn t4l adm dialout cdrom floppy audio dip video plugdev lpadmin scanner admin