Linuxshell check process PID

Linuxshell checks the process PID-general Linux technology-Linux programming and kernel information. The following is a detailed description. #
# Check the pid of such program
#
CheckPid (){
If [-z "'ps x | grep $1 | grep-v grep | grep-v $0 | awk '{print $1}'' "]; then
Echo "The $1 program cant run well ."
Fi
}

Simple Description:

Ps reports program status.

Ps x shows all programs, not distinguished by terminals.

$1 is the first parameter of the function, for example, checkPid test. $1 = test, $0 = checkPid test.

Grep searches for matching strings in the file.

Ps x | grep $1 shows the program status that contains the keyword '$1.

Ps x | grep $1 | grep-v grep | grep-v $0 remove the influence of its own command

Awk '{print $1}' extracts and format data packets from the display of Command Execution

For example:

Ps x | grep test | grep-v grep | grep-v "checkPid test"

After execution, it is displayed:

12040 pts/1 Ss test

So,

Ps x | grep test | grep-v grep | grep-v "checkPid test" | awk '{print $1 }'

Shown:

12040

That is, the PID of the process.