Linux System common commands

Date of 1st

1 time to view the current system by date date

2 format display time date +%y--%m--%d, the middle of the connection symbol can be arbitrary

3 Set the time of the system sudo date-s "Xx:yy::zz"

4 View Calendar

5 using Uptime to view the system's running time

2 Output View command

1 using echo to show what is entered

2 using Cat to display the contents of a file

3 The contents of the display file with the more command page (only page DOWN)

3 using the less command to page the contents of the display file (able to page up and down), press Q exit view

4 Displays the first few lines of the file with the head command. The default is 10 lines

We can also specify the number of rows to display by-N x

5 Use the tail command to display the end of a file line, the default is 10 lines

We can also specify the number of rows to display by-N x

3 View the hardware information

1 PCI devices for viewing hardware through LSPCI, you can display detailed information with-V followed by

2 USB device to view hardware through LSUSB, you can display detailed information in the rear plus-V

3 through Lsmod to view the driver that the system has loaded

4 Shutdown and reboot

1 Shutdown command

1 immediate shutdown sudo shutdown-h now

2 10 minutes after shutdown sudo shutdown-h +10

3 Specify 23:30 shutdown sudo-shutdown-h 23:30

4 Restart sudo shutdown-r now

2 Use the Poweroff command to shut down the machine immediately

sudo poweroff

3 Use the reboot command to reboot immediately

sudo reboot

5 Archiving and compression

1 compressing files with zip command

Zip xxx.zip destination File

2 using unzip to extract files

Unzip Xxx.zip

3 using the TAR command to archive folders (and compression is different)

1 TAR-CVF Xxx.tar target folder

For example, I want to back up the Goagent folder in my home directory, so I can create an archive file

4 Unlock an archive TAR-XVF Xxx.tar

5 Archive a file first and then compress Tar-cvzf xxx.tar.gz target folder

6 Find

1 Use the Locate command to quickly find files and folders, this command must be established in advance database, the database updated once a day

We can use UpdateDB for manual updates.

2 Use Find command advanced search, powerful real-time search command, can support multiple conditions lookup, but slow

Find Lookup Location Lookup parameter

7 CD command switch working directory

1 PWD----View current working directory

2 CD ~----back to User home directory

3 CD. ----go back to the previous level directory

4 cd-----Back to the last working directory

5 cd/----Back to the root directory