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Today, I would like to share with you what are the basic commands of Linux and how to use the relevant knowledge points, the content is detailed, the logic is clear, I believe most people still know too much about this knowledge, so share this article for your reference, I hope you can get something after reading this article, let's take a look at it.

1. Review common commands

Command cd: open folder

Command ls: view the files in the directory

Command ls-l (ll): view the details of the files in the directory

Command pwd: view current location

The command mkdir: create a folder. Add the parameter-p to create a cascaded folder.

Command touch: create a file

Command vi: edit a file (similar to editing a file using notepad)

Command vim: edit a file (similar to editing a file using Word)

Command >: clear the contents of the file and append the correct redirection to the end of the file

Command > >: do not empty the contents of the file, append the correct content to the end of the file

Command 1 >: equivalent to command >

Command 1 > >: equivalent to command > >

Command 2 >: clear the contents of the file and append the wrong redirection to the end of the file

Command 2 > >: do not empty the contents of the file, append the wrong redirection to the end of the file

II. Copying and deletion

1. Copy / backup file command cp generally backs up the source file before editing the contents of the file. The file after backup is + .bak after the file name (used to distinguish between files)

[root@jsh-01 ~] # cd / usr/local/src/ test [root @ jsh-01 test] # ls1.txt [root @ jsh-01 test] # cp 1.txt 1.txt.bak [root @ jsh-01 test] # ls1.txt 1.txt.bak [root @ jsh-01 test] # cp 1.txt / usr/local/ src [root @ jsh-01 test] # ls / usr/local/src1.txt mysql-5.6.36-linux-glibc2.5-x86_64.tar.gz test

2. Copy directory command cp-r: copy the directory and its contents. 3. Move files or directories, command mv 4, delete files, command rm

[root@jsh-01 test] # ls1.txt 1.txt.bak 1.txt.bak2 1.txt.bak3 1.txt.bak4 [root @ jsh-01 test] # rm 1.txt.bak4rm: remove regular file '1.txt.bak4? Y [root @ jsh-01 test] # ls1.txt 1.txt.bak 1.txt.bak2 1.txt.bak3

5. Delete the directory and command rm-r (if the directory is not empty, you will be prompted whether to delete the files in the directory. ) 6. Force the deletion of a directory, using the command rm-rf (whether the directory is empty or not)

[root@jsh-01 src] # ls1.txt mysql-5.6.36-linux-glibc2.5-x86_64.tar.gz test [root @ jsh-01 src] # cp test test.bakcp: omitting directory 'test' [root@jsh-01 src] # cp-r test test.bak [root @ jsh-01 src] # ls1.txt mysql-5.6.36-linux-glibc2.5-x86_64.tar.gz test test.bak [root @ jsh-01 src] # rm-r test.bakrm: descend into directory' test.bak'? N [root @ jsh-01 src] # rm-r test.bakrm: descend into directory 'test.bak'? Yrm: remove regular file 'test.bak/1.txt.bak'? Yrm: remove regular file 'test.bak/1.txt'? Nrm: remove directory 'test.bak'? N [root @ jsh-01 src] # ls1.txt mysql-5.6.36-linux-glibc2.5-x86_64.tar.gz test test.bak [root @ jsh-01 src] # ls test.bak/ 1.txt [root @ jsh-01 src] # rm-rf test.bak [root @ jsh-01 src] # ls1.txt mysql-5.6.36-linux-glibc2.5-x86_64.tar.gz test III, fine command: find

Generally, you should find the files accurately before deleting them to avoid erroneous deletion. Command format: find path (where to find it)-type f-name "1.txt" where-type refers to the type of search. The commonly used parameters are f and d. F is the file file; d is the directory directory.

[root@jsh-01] # ll / usr/local/srctotal 308920Khokyo rkashi-1 root root 60 Dec 17 21:30 1.txtKui rkashi-1 root root 316320366 Nov 25 19:39 mysql-5.6.36-linux-glibc2.5-x86_64.tar.gzdrwxr-xr-x 2 root root 4096 Dec 17 22:02 Testt [root @ jsh-01] # find / usr/-type f-name "1.txt" / usr/local/src/test/1.txt/usr/local/src/ 1.txt [root @ jsh-01 ~] # find / usr/-type f-name '1.txt'/usr/local/src/test/1.txt/usr/local/src/ 1.txt [root @ jsh-01 ~] # find / usr/-type f-name 1.txt/usr/local/src/test/1.txt/usr/local/src/1.txt IV, Pipe character "|"

The general pipe character is followed by the xargs command to convert the output in front of the pipe character to the command line. The pipe character function: passes the result of the previous command of the pipe character to the following command.

[root@jsh-01 ~] # echo 123456789 > / usr/local/src/ 1.txt [root @ jsh-01 ~] # echo 666666666 > / usr/local/src/test/ 1.txt [root @ jsh-01 ~] # find / usr/local/src/-type f-name 1.txt | xargs cat666666666123456789 [root@jsh-01 ~] # find / usr/-type f-name 1.txt | xargs ls-Lashin RWRAFT-1 root root 10 Dec 20 20:37 / usr / local/src/1.txt-rw-r--r-- 1 root root 10 Dec 20 20:38 / usr/local/src/test/1.txt V, Filter the command grep

Find (filter) what you want in the file and output it. For example: grep "666" 1.txt

Grep-v was excluded. Find the content you want to exclude in the file and display the excluded content.

[root@jsh-01 test] # cat 1.txt6666666666 [root @ jsh-01 test] # grep "5" 1.txt [root @ jsh-01 test] # grep-v "5" 1.txt is all the content of this article "what are the basic commands of Linux and how to use them?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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