[Linux] C Shell (csh) cksum用法: Calculate file checksums

Overview

The cksum command in C Shell (csh) is used to compute and display the checksum of a file along with its byte size. This is useful for verifying the integrity of files by comparing checksums.

Usage

The basic syntax of the cksum command is as follows:

cksum [options] [arguments]

Common Options

• -a, --algorithm=ALGO: Specify the checksum algorithm to use (e.g., MD5, SHA1).
• -b, --binary: Treat files as binary.
• -h, --help: Display help information about the command.
• -v, --version: Show version information of the command.

Common Examples

Here are some practical examples of using the cksum command:

1. Calculate checksum for a single file:

   cksum myfile.txt
   

2. Calculate checksum for multiple files:

   cksum file1.txt file2.txt file3.txt
   

3. Use the binary option:

   cksum -b mybinaryfile
   

4. Display help information:

   cksum --help
   

5. Check checksums of files in a directory:

   cksum *
   

Tips

• Always verify the checksum of downloaded files to ensure they are not corrupted.
• When comparing checksums, ensure that the files being compared are identical in size and content.
• Use the -a option to specify a different algorithm if needed for enhanced security.