Determine whether a command succeeds in Linux

Tag: SSAs Linu returns the start command to perform the tar execution in art Linux

After each basic command executes, there is a return code, which is represented by $, and the return code that executes successfully is 0, for example:

If [$?-ne 0];then
    Action on Failure of previous command execution

Else
    Action on successful execution of previous command
Fi

For example, starting JBoss in Linux determines whether the startup is successful

Service Imx_jbossas Start
If [$?-ne 0];then
    echo "Failed"
Else
   echo "Success"
Fi

Determine whether a command succeeds in Linux