How to use cat commands in linux

In linux, the cat command is commonly used in linux. cat has three main functions: www.2cto. com1. the entire file is displayed at a time. $ Catfilename2. create a file from the keyboard. $ Cat & gt; filename can only create new files...
In linux, cat commands are commonly used in linux. cat has three main functions: www.2cto.com 1. display the entire file at a time. $ Cat filename2. 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 the blank row is not numbered-s or-squeeze-blank, when there is a blank row with more than two consecutive rows, for example: cat-n linuxfile1> linuxfile2 add the file content of linuxfile1 to the row number and enter cat-B linuxfile1 linuxfile2> linuxfile3 put li Add the row number to the file content of nuxfile1 and linuxfile2 (the blank row is not added) and then append the content to linuxfile3. Example: add the row number to the file content of linuxfile1 and enter cat-n linuxfile1> linuxfile2 to add the row number to the file content of linuxfile1 and linuxfile2) then, append the content to linuxfile3. Cat-B linuxfile1 linuxfile2> linuxfile3cat/dev/null>/etc/test.txt this is to clear the/etc/test.txt file content this article is from the time drift bottle