1. Linux summary
1.1 Linux summary
Linux It is a multi-user network operating system with stable performance
1.2Linux characteristic
- The system is open source and free
- Very low hardware requirements 800M 3-4
- The system is stable
- Better system security ( Military enterprises Broken net )
1.3Linux System mainstream products
1.4 Linux command
explain :Linux It's all file based . also Linux The directories in are all tree structures
1.4.1 cd Command set
ifconfig/ip addr Check IP Address
pwd Check the current position
tab key Automatic completion ( Pay attention to uniqueness )
**cd / Return to root
cd . Current directory
cd .. Go back to the previous Directory
cd /usr/ Enter into usr Catalog
cd – Back to previous directory **
cd Go straight home
cd ~ User home directory ****1.4.2 ls Contents and ll file
1.4.3 Directory operation
mkdir Create directory
mkdir a establish a Catalog
mkdir -p a/b establish a Catalog , And in a Create in directory b Catalog
mkdir -m 777 c Create a permission for 777 Of C Catalog
rmdir Delete directory （ If there are files in the directory , You can't use this command ）1.4.4 Vi/vim establish / see / Edit the file
Command line ：Esc Switch to command line mode .
Edit mode ：
Press i, Start editing in front of the cursor
Press a, Start editing after the cursor
Press o, Start editing on the next line of the current line
Press u, Undo the previous operation
Bottom line mode ： Press shift+： The colon .
:q! Exit without saving
:wq Save and exit
:/world From the current cursor , Upward search world keyword
:?world From the current cursor , Look behind world keyword
1.4.5 Delete file
rm Delete file
rm n.txt Tips y Delete n give up
rm –f n.txt No prompt
rm –rf dirname Do not prompt recursively delete all contents in the directory
rm –rf * Delete all files
rm –rf /* Delete all subdirectories, all and files 1.4.6 Copy and move files
cp Copy file
cp nginx.conf n.txt
cp –R tomcat1 tomcat2 # Copy the entire directory
mv Change file name , Moving files
mv n.txt m.txt Modify file name 1.4.7 Packing command
tar –cvf n.tar ./* Compress all files and directories in the current directory , The file named n.tar
tar –xvf n.tar Unzip the files in the package to the current directory （ If the decompression is not successful for a long time Ctrl+C Introduction ）
tar –cvzf m.tar.gz ./* Compressed files
tar -zxvf m.tar.gz decompression m.tar File to current directory 2. virtual machine
2.1 characteristic
1. Create a new virtual image of the existing operating system through the virtual system , It has a real windows The system has exactly the same function
2. You can install and run the software independently , Save the data
