- Find the file: Find/-name htt. conf-print locate (first updatedb) which
- Show file content more less head tail cat PG (pagination) Cat
- File merging: CAT file 1 file 2> output file
- Search for the grep [Option] string file list
- Sort file content sort
- Compare file content comm (sort the ordered files)
- Diff-B ignore space-B ignore empty rows-I ignore case results: <first File> Second file
- Show Calendar Cal 12 2007
- Print LPR lp
- Directory operation:. indicates the current directory. parent directory
- Create directory mkdir copy CP-r Delete Rm-R or rmdir (-RF is not empty)
- Switch directory CD Program/return user main directory CD current directory pwd
- Mount CDROM: Mount/dev/CDROM/mnt/CDROM
- Mount a USB flash drive: Mount/dev/sda1/mnt/USB
- Unmount/mnt/CDROM
- View the process PS to stop a process. The kill priority is nice renice.
- Process Automation cron at batch
- Unzip tar-zxvf nmap-3.45.tgz
- Installation: rpm-I file. rpm
- Space usage DF-A (-T)
- Statistical space size Du-s only show total-H show specific size
- File Size LS-SH
- Show partitioned fdisk-l
- Adjust partition size parted
- Format mkfs
- Disk e2fsck/dev/hdax-a fixed
- MD5 verification: md5sum X. ISO
- Memory: Free-m
- Kernel version uname-A (-R)
- System Information uname-
- Boot information dmesg
- Host Name hostname IP: Hostname-I ping
- Configure ifconfig
- Telnet (log out)
- FTP (>! Exit)
- Netstat network connection information
- Programming style, beautify C source code: indent-kr-i8 Quan. c
- Glibc library ftp://ftp.gnu.org/gnu/glibc
- View version: rpm-Q glibc
- Background processing: Hello &
- If you want to end kill 3216, use kill-9 2365
- Command combinations separated by semicolons: Pwd; Date
- Use cat to create a file: CAT> file. tmp, enter the file, and press Ctrl + D.
- Number of lines in the WC statistics File
- View shell: Echo $ shell change: CHSH
- BG conversion process to the background
- FG conversion process to foreground
- Log on to login and exit logout or
- Change passwd password terminate program Ctrl + C Delete break
- Date termination input Ctrl + d
- Displays the list of users logging on to the system. Who su switches to the Super User
- Show your login name who am I
- Whereis: query the command directory and help document directory
- Which: query the directory where the command is located (similar to whereis)
- ID: print your UID and GID. (UID: the unique ID of a user. GID: the unique ID of a user group. Each user can have only one unique UID and gid)
- History command: History
- !! Last Command executed
- Finger allows users to query data of other users
- Start the mail program mailx mail exit the mail system x and enter the mail number to read, such as: 2
- View the environment variable printenv echo $ PATH env
- Add the environment variable export Path = $ path:/directory
- Delete environment variable unset test set read-only test
- Current working directory PWD current user home directory
- Current Shell seconds (seconds) Previous working directory oldpwd
- History command histfile histsize Level 1 prompt PS1 Level 2 PS2
- Escape Character:\! History number of this command \ n newline \ t time \ ddate \ u username \ H hostname \ W Current Directory
- File Operation copy CP Delete RM mobile mv
- View LS-l-
-Rwxrwxr-x 2 feisky 5022 07-15
-File type:-General File d directory B block Device C character device P channel l link file
Rwx read and write permissions: three groups, owner, group, and others
2 connections
Feisky: Group of the owner
5022 File Size
07-15 Last modified Date and Time
A file name
- Modify file access permissions: chmod U-X, G + W, O + W file. a u: User G: Group O: Other A: All
- Modify file ownership: chown A. Out Fei
- Chgrp A. Out Fei
- File type determination: file Satellite
- Rename: MV Path 1 Path 2
- Link: ln file name New File Name
- Output redirection:
- > Redirect the output to a file (new file)
- > Append redirection. Only Add at the end, for example, Cal 2007> 2007.
- Input redirection: <
- Pipeline: | directly obtain the output of a program as the input of the next program without generating a temporary file
- Ls-L/dev/hda * | rev | cat
- Ls display color when viewing files:1. Blue --> directory 2. Green --> executable file 3. Red --> compressed file 4. Light blue --> linked file 5. Gray --> other files
- Mount a USB flash drive on the Development Board: Mount-T vfat/dev/SCSI/host0/bus0/target0/lun0/Part1/mnt
- View the local IP Address: ifconfig
- Add System Path: Export Path = $ path:/usr/local/ARM/2.95.3/bin/
- CTRL + R History commands
- Format code: indent-Kr-i8 test. c
