In this tutorial, we’ll outline and discuss how to exit a shell script from a subshell. 2. UsingexitCommand Theexitcommand plays a pivotal role in terminating shell scripts or subshells. However, when invoked
the utility nm-online will tell you whether the network is up or down. If the network is up, the command returns zero as its exit code; it’s nonzero otherwise. (For more on how to use an exit code
For example, if you’re sending data from Host A to Host B, as shown in Figure 9-1, your bytes leave the application layer on Host A and travel through the transport and network layers on Host A; then they go down to the physical medium, across the medium, and up again through the...
When you execute a command in Linux, it generates a numeric return code. This happens whether you're running the command directly from the shell, from a script, or even from anAnsibleplaybook. You can use those return codes to handle the result of that command properly. What the return co...
A shell script needs to be saved with the extension.sh. The file needs to begin with theshebang line(#!) to let the Linux system know which interpreter to use for the shell script. For environments that supportbash, use: #!/bin/bash ...
Once completed, exit from the chroot shell: exit Unmount the root partition and exit your root: umount/mnt/recover exit Lastly, remove the Live CD and reboot into your Linux system. Learning how to change the root password in Linux is just the one part of keeping your machine in tip-top...
If you are logged into a remote Linux system via SSH, you just need to use the exit command to log out of SSH. exit That's fine. But what if you want to log out some other user from the SSH connection? In this quick tip, I'll show you how you can kick any user off the sys...
Next we define, the exit STATUS using operator $?: root@kali:~# STATUS="$?" root@kali:~# [ "$STATUS" -eq 0 ] && echo "STATUS OK" root@kali:~# [ "$STATUS" -ne 0 ] && echo "STATUS KO" STATUS KO STATUS equal to 0 means a success (failure if different to 0). In our ...
如何使用 Linux shell script 制作一个命令行交互式菜单窗口界面 All In One Q: 如何实现一个类似raspi-config的交互式命令行菜单对话框功能 raspi-configis the Raspberry Piconfiguration tooloriginally written by Alex Bradbury. To open the configuration tool, type the following on the command line: ...
Scenario 2: Normal user logout (e.g., typing exit or logout) During a normal user logout, initiated by commands like exit or logout, the login shell begins its termination sequence. As part of this process, the shell typically sends aSIGHUPsignal to all of its child processes, includin...