The exec command can be used to initialize the variable with a value.
通过使用 exec命令,可以用值来初始化变量。
The exec command can also be used to execute procedures as shown in the example below.
exec命令还可用于执行下面示例中所示的程序。
The exec command also launches a command, but instead of spawning a new process, exec 「replaces」 the task of the current process -- that is, the shell (or script) process -- with the new command.
exec命令还启动另外一个命令,但是与产生新进程不同,exec 使用一个新命令来「替换」当前进程——即Shell进程——的任务。
The exec command causes init.system to replace the running bash process.
exec命令使init . system取代正在运行的bash进程。