echo"Check output of 'service$SERVICE_NAMEstatus' to determine if it's running." else echo"$SERVICE_NAMEis not running or command failed." fi # 对于Upstart服务 ifinitctl status$SERVICE_NAME| grep -q'running';then echo"$SERVICE_NAMEis running." else echo"$SERVICE_NAMEis not running." fi...
The “which” command in Linux is used to identify the location of an executable file in the system’s PATH environment variable. It helps to determine the absolute path of a command or program that will be executed when it is invoked in the command line. Here are some key points about ...
Every Unix file has a set of permissions that determine whether you can read, write, or run the file. Running ls -l displays the permissions. Here’s an example of such a display: 每个Unix文件都有一组权限,确定您是否可以读取、写入或运行该文件。 运行ls -l命令显示权限。以下是一个示例显示...
Before proceeding, read 5.8.3 How GRUB Works to get an idea of how PCs boot and determine whether you’re using MBR or EFI boot. Next, build the GRUB software set and determine where your GRUB directory will be; the default is /boot/grub. You may not need to build GRUB if your dis...
Determine the GRUB root with the echo command (recall that this is where GRUB expects to find the kernel): 现在让我们看看 GRUB 的文件系统导航功能。使用 echo 命令确定 GRUB 根目录(请记住,这是 GRUB 希望找到内核的位置): grub> echo $root hd0,msdos1...
If you can enter commands into the shell, you can write shell scripts (also known as Bourne shell scripts). A shell script is a series of commands ...
Thewhoamicommand in Linux returns the current user’s username. It stands for “who am I?” and it’s often used to determine the current user’s identity in shell scripts or the terminal. Let’s see the output of both the commands and the way we can use these. ...
kdump is a feature of the Linux kernel that creates crash dumps in the event of a kernel crash. In the event of a kernel crash, kdump boots another Linux kernel and uses it to export an image of RAM, which is known as vmcore and can be used to debug and determine the cause of the...
#ifdefCONFIG_AUTO_ZRELADDR@determine final kernel image address mov r4, pc and r4, r4, #0xf8000000add r4, r4, #TEXT_OFFSET#elseldr r4, =zreladdr#endif 2.1 Linux 内核入口 stext 打开arch/arm/kernel/head.S可以看到: /* * Kernel startup entry point. ...
lspv determine which disk or set of disk is experiencing contention on a SCSI bus.filemon usage scenario: determine if hot files are local or remote.determine if paging space dominates disk util.look for heavy physical vol util. determine if the type of drive or SCSI adapter causing a ...