Introduction Have you noticed a problem in the previous lessons? A significant portion of the commands we have taught so far directly outputs to the terminal screen. For example, you should have developed muscle memory for the ls command. Whether you successfully run the ls command and get a file list or the command fails … Read more
Introduction In the previous lesson, to avoid directly outputting the results of certain commands to the terminal, we used redirection to output the results to a file. There is another flow of output information that we need to learn, which is the pipe operator. By using a simple vertical bar “|”, we can avoid generating … Read more
In Linux system administration and operations, we often need to run various commands and scripts. Some commands generate a large amount of output, while others may frequently report errors, affecting the readability of logs or consuming storage space. Efficiently discarding unnecessary output and error messages is a skill that Linux operations engineers must master. This … Read more