2018/03/10 cksum of a linux command daily

Daily one Linux command 2018-03-10

Linux command Cksum

cksum [File]

　　

Today downstairs, an aunt died, not only sigh, now, really and before the same, upstairs downstairs do not know who live?

　　　

The Cksum command is used to check that the file's CRC is correct. Ensure that files are not damaged while they are being transferred from one system to another.

CRC is an error-checking method, the standard of which is specified by CCITT, at least 99.998% known errors can be detected.

It is clear that the function of this command is to check the file of the same, in the choice of MD5 and hash, using which method, then see how to choose, how to consider.

　　

Here is a brief look at its usage:

　　　　

Using cksum > Files

The checksum value of the first CRC, and the second is the number of file bytes.

Modifying any of the contents of the file will change the value of the checksum.

This function may be used later, with new knowledge, and then back to the content.

When the specified file is checked by the instruction "cksum", the instruction returns the check result for the user to check if the file is correct. If you do not specify any file name or the given file name is "-", the Instruction "Cksum" will read the data from the standard input device

　　

2018/03/10 cksum of a linux command daily