Commands tagged awk (348)

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Quickly add user accounts to the system and force a password change on first login
This command is a bit Linux specific, as --stdin doesn't exist for passwd on many Unix machines. Further, useradd is high level in most distributions and Unix derivatives except for the Debian family of distros, where adduser would be more appropriate. The last bit, with chage, will force the user to change their password on new login.

Create a random password encrypted with md5 with custom lenght
This was useful to generate random passwords to some webpage users, using the sample code, inside a bash script

Merges given files line by line
In the above example all files have 4 lines. In "file1" consecutive lines are: "num, 1, 2, 3", in "file2": "name, Jack, Jim, Frank" and in "file3": "scores, 1300, 1100, 980". This one liner can save considerate ammount of time when you're trying to process serious portions of data. "-d" option allows one to set series of characters to be used as separators between data originating from given files.

Add your public SSH key to a server in one command
Just run the command, type your password, and that's the last time you need to enter your password for that server. This assumes that the server supports publickey authentication. Also, the permissions on your home dir are 755, and the permissions on your .ssh dir are 700 (local and remote).

Gets the X11 Screen resolution
Requires xrandr, grep and, sed.

Display the top ten running processes - sorted by memory usage

Find the package that installed a command

Get all IPs via ifconfig
works on Linux and Solaris. I think it will work on nearly all *nix-es

Using NMAP to check if a port is open or close
Using NMAP to check to see if port 22(SSH) is open on servers and network devices.

Sort content of a directory including hidden files.
This command sorts the content including hidden files in human readable format of the current directory.


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