/bin/bashecho“Current process ID is: $$”sleep100 &echo“The most recent process ID is: $!”echo“The most recent processexitstatus is: $?” 执行 ./test_2.sh 输出的结果: Current process ID is: 15599 The most recent process ID is: 15600 The most recent process IDexitstatus is: 0...
$$#Shell本身的PID(ProcessID,即脚本运行的当前 进程ID号)$!#Shell最后运行的后台Process的PID(后台运行的最后一个进程的 进程ID号)$?#最后运行的命令的结束代码(返回值)即执行上一个指令的返回值 (显示最后命令的退出状态。0表示没有错误,其他任何值表明有错误)$*...
为简化作业控制的用户界面的实现,操作系统负责管理“当前终 端的进程组” (current terminal process group ID) 的概念。这个进程组的成员 (进程组 ID 是当前终端进程组 ID 的进程) 可以收到键盘产生的信号,例如 SIGINT. 这些 进程被称为 foreground(前台的)。 Background (后台的) 进程是那些进程组 ID 与终端...
Similarly, your bash terminal session will also be assigned with a process ID. There is a special variable called"$"and"$BASHPID"which stores the process ID of the current shell. Go ahead and run the below command to see what is the process ID of your current shell. Both"$"and"$BASH...
$!Shows the process ID of the last background command. $$Gets the process ID of the current shell. $-It will print the current set of options in your current shell. Now, let's have a look at them one by one in detail. $0: Get the name of the script ...
SIGTERM) // Allow the current process to lock memory for eBPF resources. if err := rlimit.RemoveMemlock(); err != nil { log.Fatal(err) } // Load pre-compiled programs and maps into the kernel. objs := bpfObjects{} if err := loadBpfObjects(&objs, nil); err != nil { log....
爲簡化作業控制的用戶界面的實現,操作系統負責管理“當前終端的進程組” (current terminal process group ID)的 概念。這個進程組的成員 (進程組 ID 是當前終端進程組 ID 的進程) 可以收到鍵盤產生的信號,例如 SIGINT. 這些 進程被稱爲 foreground(前臺的)。 Background (後臺的) 進程是那些進程組 ID 與終端...
The “kill” command sends a signal to a process, which can be used to terminate the process. To use the kill command, we need to get the process id of the current shell via the command: $ echo $$ The output shows that the process id of running the Bash shell is 22133. ...
Sometimes when youtry to eject a disk, unmount a volume or empty the Trash, you get caught out by some app or process that’s using the file and won’t release it. This is usually signalled by a warning dialog telling you the said file is “in use” or is “locked”. ...
$ Expands to the process ID of the shell. In a () sub- shell, it expands to the process ID of the current shell, not the subshell. ! Expands to the process ID of the most recently executed background (asynchronous) command. 0 Expands to the name of the shell or shell script. ...