Linux common commands and basic concepts

Copy

Copying of files CP copy of source file destination file folder CP -r source folder destination folder

Delete

Deleting Files RM File name Delete folder RM -rf Folder

View File types

 File File name

Compression and decompression

Zip Unzip Unzip Compress the   file to compress the zip destination file. Zip source folder

. Tar . GZ Decompression Tar zxvf tar source file compression tar z cvf the destination file. tar. GZ source Folder

. Tar . bz2 Decompression Tar JXVF Compressed file compression tar jcvf the target file. tar. bz2 source Folder

　

File identifiers

0 - standard input 1 - standard output 2 - Error output redirect output redirection > input redirection <  Append write >> Use example merge two files to third file  cat file1 file2 > file3 Note: Redirected output to a file can only be normal output, error output is normally Unable to write to the redirect file so how to tell the error message redirect to the file?  ls2>out.txt plus 2, which means error output to OUT.txt file

　

Pipeline

The so-called pipeline, is the output of the previous command as input to the next command

ls -a| grep Vim

File permissions

chmod

Find

--regexp regular expression, support regular expression in Ubuntu Note: Locale does not directly look up files in the system (nonsense, otherwise it cannot be so fast), but instead reads a database (maintained by the system). Therefore, for a file that has just changed, it may not be found. UpdateDB is basically performed once a day. The remedy is to run the updatedb manually once, run find with sudo permissions to   Find the contents of the specified folder  find . Find . | grep . txt to find the TXT file in the current directory find . -Type F finds only files found  . -type D only finds directories

　　　　　　　　

　　

　　　　　　

Linux common commands and basic concepts