Osetc.com Website Review

If you want to delete the line of the file, and It is immediately applied to the source file. The -i option is required in the sed command. Otherwise, the contents of the deleted file are displayed, but the contents of the file are not actually deleted. If you want to delete a line containing a specific character, just specify a specific character through the pattern matching part of the sed command and then delete it with the d command. For example, to delete the line containing line2, execute the following command: We can add a new line after a specific line by using the sed command. For example, to add a line line2 b after the line containing line1, execute the following command: Replace the line3 string in the line containing the line3 in the file with line4. Because all data in linux is stored in the form of a file, it is still said that the disk device exists in the form of a file. So we can use the grep command to filter out the contents of our deleted files and redirect them to another file, which also achieves the purpose of restoring files. 1# Determine the disk where the root directory is located 3# Restore the contents of the deleted file FIO.TXT to RECOVERY.TXT with the GREP command -a Treat the binary file as a normal file -B, –before-content Filter out the specified pattern string before A specific number of lines -A, -after-content Number of created files: 0 Number of deleted files: 1,002 (reg: 1,001, dir: 1) Number of regular files transferred: 0 Total file size: 0 bytes Total transferred file size: 0 bytes Literal data: 0 bytes File list generation time: 0.001 seconds File list transfer time: 0.000 seconds -rw-r--r-- 1 root root 24202 March 18 23:30 fio1.txt -rw-r--r -- 1 root root 0 March 24 23:53 fio.txt Argument list too long The script to be executed is as follows: do # Pas* the output of the ls command to the for loop rm -rf $I root@devops:~ # vi delF.sh root@devops:~# chmod u+x delF.sh When we want to empty the contents of a large file, we usually open it via the vi editor Files, and then delete their contents, but if the file content is too much, or the file is too large, opening the file may be slow or emptying the contents of the file will take a lot of time. Below we will introduce 5 kinds of easy to use How to empty the contents of the file?