Linux Ctrl + z usage

Suppose you find it takes a long time to run a program on the front end, but you need to do other things, you can use
CTRL-Z, terminate the program, and then you can see the system prompt:
[1] + stopped/root/bin/rsync. Sh
Then we can schedule the program to the background for execution: (the number following BG is the job number)
# BG 1
[1] +/root/bin/rsync. Sh &
Run the jobs command to view running tasks:
# Jobs
[1] + running/root/bin/rsync. Sh &
If you want to call it back to the foreground, you can use
# FG 1
/Root/bin/rsync. Sh
In this way, you can only wait for this task to be completed on the console.
& Drop the command to the background for execution
[CTRL] + Z: Throw the foreground task to the background and pause
Jobs view the working status of the background
FG % jobnumber: Get the background task to the foreground for processing
BG % jobnumber put the task to the background for processing
Kill tasks in the management background
Run the command Ctrl + Z to force the current process to be switched to the background and stop it.
1. resume the process (background)
(1) Use the command BG
Example:
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $./tcpserv01
* Ctrl + Z is used here, And serv01 is stopped *
[1] + stopped./tcpserv01
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $ BG
[1] +./tcpserv01 & * at this time, serv01 runs in the background *
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $
(2) What if I use Ctrl + Z to stop several programs?
Example:
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $ jobs
[1]-running./tcpserv01 &
[2] + stopped./tcpcli01 127.0.0.1
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $ BG % 1
Bash: BG: Task 1 has been transferred to the background * run in the background *
2. Restore the process to the foreground
Example:
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $./tcpserv04
[1] + stopped./tcpserv04
Zuii @ zuii-desktop :~ /UNP/tcpcliserv $ FG
. /Tcpserv04
Summary:
(1) Ctrl + z stop the process and put it in the background
(2) jobs displays the currently paused Processes
(3) BG % N run the nth task in the background (there is a space before %)
(4) FG % N run the nth task on the foreground
BG by default. If FG does not contain % N, the last process is operated!