Linux Learning Notes

1. Common Command Record

ls: Lists the files and directories in the current directory
　　 -al: Lists all file directories, including hidden files (. Start)
Date: Displays the current date and time
　　 +%y/%m/%d: Displays the current date in 2011/01/01 format
　　 +%h:%m: Displays the current time in 12:00 format
Echo $LANG: Explicit current system supported languages
Lang=en_us: Modify the language supported by the system (ZH_CN: Chinese, en_US: English)
Cal: Show Calendar
No parameter: Show Calendar of the month
(year): Displays all calendars for one
(Month year): Displays the calendar for a month in a
BC: Calculator, enter calculator environment
　　 scale=3: Indicates that 3 is displayed as a decimal
　　 quit: Used to exit the calculator environment
[TAB]
Press two times after the command: Show all commands that begin with a * command completion
File is pressed two times: show all files that begin with * "File completion" (Error)
File is pressed once: auto-complete file name
[Ctrl]-c: Interrupt Command execution
[ctrl]-d: Indicates end of keyboard input, or exit text interface (equivalent to exit)
Mans: Online query command function, enter the man environment
　　 Q: Exiting the man environment
Nano: Nano text Editor
File name (with suffix): New or open the specified file
W.H.O.: View Online users
Netstart: Network Commands
　　 -AView Network Online Status
PS：
　　 -aux: View programs executed in the background
shutdown: Shutdown command
　　 - T sec: Power off after a number of seconds
　　 - k: Send warning message, not true shutdown
　　 - R: Restart the system after the service is stopped (common)
　　 - H: Shut down the system after the service is stopped (common)
　　 - N: Shuts down directly with shutdown function without the INIT program
　　 - F: A disk check that forces a bypass of fsck after shutting down and powering on
　　 - F: Force a disk check for fsck after a system reboot
　　 - C: Cancels the contents of the shutdown command already in progress
　　 Time: Specify shutdown time (required)
　　　　 Now: Represents a time of 0, indicating the current
　　　　 20:23: Indicates the specific time
　　　　 +10: Say 10 minutes in a second.
Sync: Write data to disk synchronously, shutdown command shutdown call this command, but to be safe, you can call sync multiple times before executing the shutdown command to write in-memory data to disk save
reboot: Restart command
Halt: Shutdown command
Poweroff: Shutdown command
　　 - F: Force shutdown, do not invoke shutdown command, hardware shutdown
Init: Toggle System Operating mode
　　 [0-6]: A total of seven operating modes are available for switching

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Linux Learning Notes