Additive color mixing begins with black and ends with white; as more color is added, the result is lighter and tends to white. The RGB colors are light primaries and colors are created with light. Percentages of red, green, & blue light are used to generate color on a computer screen.
In shell scripting we often need to check if file or directory exists and take appropriate action. This post show you how to check it and how this check use in your script. For checking we will use file test operators -f for file and -d for directory, which return TRUE if file or directory exists. And here is output of the script.
The only way to check if a file is corrupt is to try and read it; only software which knows how to read that particular format can do that.What you could do is use file to identify the type of the file, and then use the type to choose an appropriate program to check the file.You could write a script like this: But you'd have a lot of work to do to fill out the case statement.f you happen to use ZFS, either you can read the file and it is guaranteed not being corrupted or you got a read error and it is. Edit After the wise comments, here is a clarification of my answer: ZFS can protect and detect against silent data corruption.