The difference and use of ctrl+z, CTRL + C, and ctrl+d in Linux commands __linux

The meaning of ctrl+c,ctrl+d,ctrl+z in Linux

Both Ctrl + C and ctrl+z are breaking orders, but their role is different.

CTRL + C is the execution of a forced interrupt program.

The ctrl+z is to break the task, but the task is not over, he is still in the process he just maintains a pending state.

[root@localhost ~]# ping baidu.com ping baidu.com (220.181.57.217) bytes of data. Bytes from 220.181.57.217:icmp_seq=1 ttl=128 time=58.7 ms-bytes from 220.181.57.217:icmp_seq=2 ttl=128 time=76.6 m  S-bytes from 220.181.57.217:icmp_seq=3 ttl=128 time=54.6 ms-bytes from 220.181.57.217:icmp_seq=4 ttl=128 time=72.7 Ms bytes from 220.181.57.217:icmp_seq=5 ttl=128 time=51.3 ms-bytes from 220.181.57.217:icmp_seq=6 ttl=128 time=12 4 ms bytes from 220.181.57.217:icmp_seq=7 ttl=128 time=71.2 ms-bytes from 220.181.57.217:icmp_seq=8 ttl=128 time=5 2.4 ms bytes from 220.181.57.217:icmp_seq=9 ttl=128 time=51.7 ms-bytes from 220.181.57.217:icmp_seq=10 ttl=128 Tim e=254 ms bytes from 220.181.57.217:icmp_seq=12 ttl=128 time=64.2 ms-bytes from 220.181.57.217:icmp_seq=13 ttl=128 time=51.8 ms bytes from 220.181.57.217:icmp_seq=14 ttl=128 time=92.5 ms-bytes from 220.181.57.217:icmp_seq=15 ttl= 128 time=52.1 ms bytes from 220.181.57.217:icmp_seq=16 ttl=128 time=51.8 Ms ^z [1]+ Stopped Ping baidu.com 

The user can use the FG/BG operation to continue the foreground or backstage tasks,
FG command to restart the interrupted task of the foreground,

[root@localhost ~]# FG
Ping baidu.com
bytes from 180.149.132.47:icmp_seq=6 ttl=128 time=59.0 ms bytes
F Rom 180.149.132.47:icmp_seq=7 ttl=128 time=67.2 ms
bytes from 180.149.132.47:icmp_seq=8 ttl=128 time=54.5 Ms
Bytes from 180.149.132.47:icmp_seq=10 ttl=128 time=55.9 ms bytes from
180.149.132.47:icmp_seq=12 ttl=128 56.8 Ms
bytes from 180.149.132.47:icmp_seq=13 ttl=128 time=60.0 ms-bytes from
180.149.132.47:icmp_seq=14 t tl=128 time=155 ms
^z
[1]+  Stopped                 Ping baidu.com

The BG command puts the interrupted task in the background for execution.

For example: When you vi a file is, if you need to use the shell to perform other operations, but you do not intend to close VI, because you have to save the launch, you can simply press Ctrl+z,shell will be the VI process hangs ~, when you end that Shell operation, You can use FG command to continue vi your file.

Instead of sending a signal, ctrl+d represents a special binary value that represents EOF.