Look at some of the order of the Linux private dishes of bird Brother self-summary (a)

-Displays the currently supported languages Echo &lang

-Change language into English system Lang=en_us

-Display the calendar's command CAL [[month] year]

-Customary shutdown command shutdown

Parameters:

-T sec:-t after seconds, which is the meaning of a few seconds to shut down the machine

-R: Reboot after the service of the system has been shut down

-H: Shut down the system immediately after the service is dropped

-linux file Properties Ls-l

What each field means:

File type and permissions, how many file names are connected to this node, owner account number, the size of the file, the default is B; The date the file was created or the date of the last modification;

d rwx r-x r-x

File type file owner permission file belongs to user group permissions other people's permissions on the file

[d] Directory

[-] File

[L] Connection file

[b] An interface device that can be stored in a device file

[c] Serial port device inside the device file, e.g. mouse, keyboard (one-time read device)

Look at some of the commands of my brother's Linux private dishes self-summary (a)