Example of cat commands in linux

The cat command function example in linux has three main functions: 1. display the entire file at a time. $ Cat filename 2. Create a file from the keyboard. $ Cat> filename can only create new files and cannot edit existing files. 3. combine several files into one file. $ Cat file1 file2> the specific command format of file cat is: cat [-AbeEnstTuv] [-- help] [-- version] fileName description: connect the file string to the Basic output (screen or add> fileName to another file) parameter: -n or-number starts from 1 and is similar to-n for the number of all output rows-B or-number-nonblank, however, if a blank row is not numbered-s or-squeeze-blank and there are two or more consecutive blank rows, it is replaced by a blank row-v or-show-nonprinting example: cat-n linuxfile1> linuxfile2 Add the file content of linuxfile1 to the row number and enter cat-B linuxfile1 linuxfile2> linuxfile3 put linuxfile1 and li Add the row number to the file content of nuxfile2 (left blank) and then append the content to linuxfile3. Cat/dev/null>/etc/test.txt this indicates clearing the/etc/test.txt File Content