sum command in Linux with Examples

sum command in Linux is used to find checksum and count the blocks in a file. Basically, this command is used to show the checksum and block count for each specified file. When no file is specified then it will read the standard input.

Syntax:

sum [OPTION]... [FILE]...

Example: It will ask for the input of the file we want to calculate the checksum. In the following example, we are calculating the checksum for myfile.txt.

Options:

sum -r: This option will use BSD sum algorithm, use 1K blocks.
Example:
```
sum -r myfile.txt
```
sum -s: This option will use System V sum algorithm, use 512 bytes blocks.
Example:
```
sum -s myfile.txt 
```
sum –help : This option displays the help text and exit.
```
sum --help
```
sum –version : This option will show the version information and exit.
```
sum --version
```

My Personal Notes

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