What is Linux cksum Command?
In this tutorial we learn how to use cksum command in Linux. cksum command is a Linux command which do checksum and count the bytes in a file
cksum [FILE]... cksum [OPTION]
cksum command linux example
To use cksum we only need to pass the filename to the command. For our exercise let’s create a new file using echo command below
echo "Hello Howtodojo!" > hello
Now let’s check the checksum of the new file named hello that we just create
cksum hello 3769020071 17 hello
The first column of the output above is the checksum, The second column is the byte size. Since the text we enter on the hello file consists of 17 characters so it’s 17 bytes in size. The last one is the file name.
cksum Command Manual / Help
We can use
info command to see the manual page of cksum command.
cksum command also have
--help option to show list of options.
man page of cksum command can be opened using command below. To exit man or info page you can press
info page of cksum command can be opened using the command below.
help page of cksum command can be printed using the command below.
Linux cksum Command Source Code
You can find cksum command source code from the folowing repositories:
- 1. cksum source code on GitHub
- 2. cksum source code on GNU Savannah cgit
- 3. cksum source code on GNU Savannah gitweb
Related Linux Commands
You can read tutorials of related Linux commands below:
- b2sum command in Linux
- md5sum command in Linux
- sha1sum command in Linux
- sha256sum command in Linux
- sha384sum command in Linux
- sha512sum command in Linux
In this tutorial we learn how to use
cksum in Linux with practical examples. Visit our Linux Commands guide to learn more about using command line interface in Linux.