boot阶段开始于打开电源开关,结束于内核初始化完成和systemd进程成功。启动阶段接管了剩余工作,直到操作系统进入可操作状态。 因此,linux系统的启动过程如下: POST(BIOS上电自检)->GRUB(引导装载程序)->kernel init(内核初始化)->start systemd(启动systemd进程) 1.BIOS上电自检(POST(Power On Self Test)) 该阶段li...
解压之后,内核被释放,开始调用另一个startup_32()函数(同名),startup32函数初始化内核启动环境,然后跳转到start_kernel()函数,内核就开始真正启动了,PID=0的0号进程也开始了... 当内核真正开始运行后,将从/boot分区找到initial ram disk image(后面简称init ramdisk)并解压。init ramdisk要么是initrd,要么是initra...
which, including systemd itself, are background processes. systemd is the first daemon to start during booting and the last daemon to terminate during shutdown. The systemd daemon serves as the root of the user space’s process tree; the first process (PID 1) has a special role on Unix s...
systemctl stop cups.service systemctl start cups.service (若某个单元被禁用了,您可以先通过systemctl enable加上该单元名的方式将其启用。这种做法会为该单元创建一个符号链接,并将其放置在当前启动目标的.wants目录下,这些.wants目录在/etc/systemd/system文件夹中。) 还有两个有用的命令是systemctl restart和...
You will need to edit thewsl.conffile to ensure systemd starts up on boot. Add these lines to the/etc/wsl.conf(note you will need to run your editor with sudo privileges, e.g:sudo nano/etc/wsl.conf): Copy [boot] systemd=true ...
[root@testvm1 grub2]# grub2-mkconfig > /boot/grub2/grub.cfg Generating grub configuration file ... Found linux image: /boot/vmlinuz-4.18.9-200.fc28.x86_64 Found initrd image: /boot/initramfs-4.18.9-200.fc28.x86_64.img Found linux image: /boot/vmlinuz-4.17.14-202.fc28.x86_64 ...
我尝试了所有这些目标，他们都达到之前DHCP得到一个IP地址.去图：
[root@testvm1 ~]# systemctl start hello.service [root@testvm1 ~]# systemctl status hello.service ● hello.service - My hello shell script Loaded: loaded (/etc/systemd/system/hello.service; disabled; vendor preset: disabled) Active: inactive (dead) ...
[root@testvm1 ~]# systemctl start hello.service [root@testvm1 ~]# systemctl status hello.service ● hello.service - My hello shell script Loaded: loaded (/etc/systemd/system/hello.service; disabled; vendor preset: disabled) Active: inactive (dead) ...
OnBootSec:系统启动后,多少时间开始执行任务 OnStartupSec:Systemd 进程启动后,多少时间开始执行任务 OnUnitActiveSec:该单元上次执行后,等多少时间再次执行 OnUnitInactiveSec: 定时器上次关闭后多少时间,再次执行 OnCalendar:基于绝对时间,而不是相对时间执行 ...