Some basic knowledge about Linux

I. Basic

1.linux all content is saved as a file, including hardware.

2.linux does not differentiate between extensions, by permissions. #但是, contract. SH script file. conf configuration file.

3.-rw-r--r--#第一位 (-file, D directory, l soft link file), followed by each three-bit group (U owner G-owned by O others), (R read W write X performed).

4.cd./xxx/xxx #从当前路径开始.

5. Common directory function:/root directory/home directory/root Super User home Directory

Two. Common commands

1.LS-LH = = ll
Ls-a Show hidden files

2.MKDIR-P Catalog #建目录
Touch Directory #建文档
PWD #查看当前位置

3.cd/#进入根目录
CD #进入家目录
cd-#进入上次目录
Cd.. #进入上级目录

4. Delete directory: rmdir empty directory
RM-RF/File name/

5.cp-r file name/directory name/changed file name #复制
MV Original file target directory #剪切, renamed

6.cat file name #打印文件内容
Edit mode: VI i:wq! (save): q! (Not Saved)

7.echo 1111 >> File #写入
Establish Link: ln-s original file (absolute path) soft link #相当于windows下的快捷方式
ln Original file Hard link
8.updatedb #更新数据库

Search command: Locate file name

Whereis ls (-m/-b)
which LS
Whatis ls

Find search scope search criteria     
   find/root/-name file name       & nbsp -iname (case insensitive)
   find/var/log/-mtime-10
   find-size 25k    &nbs p;     -A and  -O or
   find/etc/-size +20k-a-size-50k-exec ls-lh {} \;       #大于20k且小于50k的文件并执行ls-lh
   grep-v "string" File name     &nb sp;  -V Reverse  -I is case insensitive

9. View the command:
man-f command = Whatis command command level
Man level command Details
Apropos-k passwd
LS--help
Help CD get Internal command (Whereis cannot find the path)
Info

10. Compression command:. zip. gz. bz2

Zip A.zip a pressurized
Unzip A.zip Decompression

Gzip Hehe.txt
Gzip-c hehe.txt > hehe.gz compression without deleting the original file

Gzip-r W to add and decompress a directory
Gunzip-r W

bzip2 hehe
Bzip2-k hehe
BUNZIP2 hehe.bz2

Package compression: tar.gz tar.bz2:
TAR-ZCVF w.tar.gz W
TAR-ZXVF w.tar.gz ls

TAR-JCVF w.tar.bz2 W
TAR-JXVF w.tar.bz2-c d/

11. Shutdown and restart:
Shutdown-c: Cancels the previous shutdown command
-H: Shutdown
-R: Restart
& Background Enable
Logout logout = logoff under windows

12. Mount command (allocation letter):
Mount device file name (/dev/cdrom) mount point (/mnt/cdrom)
Uninstall: Umount device name or mount point
Vi/etc/fstab

VI hello.sh
#!bin/bash
echo "Hello World"
chmod 755 hello.sh (Give execute permission)
./hello.sh the hello.sh file in the current directory

Fdisk-l Viewing device file names
Mount-t vfat/dev/sdb1/mnt/usb/#对dvd的挂载

13. View User Login command: w
W.H.O.
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Some basic knowledge about Linux