There are many shortcut keys under CentOS, and the level of operation is higher when you master it.
CTRL series:
1.ctrl+c or ctrl+\ keyboard interrupts the request and decisively kills the current task.
2.ctrl+z interrupts the current process, does not kill, puts it in the background, and enables him with FG when needed.
3.ctrl+s pause the screen output.
4.ctrl+q restore the screen output.
5.ctrl+l Empty the screen.
6.ctrl+u cuts all characters before the cursor is deleted.
7.ctrl+k cuts all characters after the cursor is deleted.
8.ctrl+w cuts the field before the cursor is deleted.
9.ctrl+y paste the part that was deleted by the CTRL+U/+K/+W key combination.
10.ctrl+a moves the cursor to the beginning of the command line.
11.ctrl+e moves the cursor to the end of the command line.
The 12.ctrl+r is found in the history command.
Linux Quick Build (CENTOS7) CTRL series