systemd | 易学教程

Launching Linux from Busybox (pivot_root or switch_root, or ? )

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问题 On a beaglebone hardware, I want to start on a partition with a minimalist busybox system (/dev/mmcblk0p2), run some checks on the 2 other partitions (/dev/mmcblk0p5 & /dev/mmcblk0p6) containing more complete Linux systems (Angström), then start on one or the other of the 2 Linux systems based on those tests. The problem is that I cannot find how to start another system correctly from busybox. What I did: From the (perfectly working) busybox system: export PATH=/bin:/sbin:/usr/bin:/usr/sbin

systemd/udev dependency failure when auto mounting separate partition during startup

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问题 EDIT: This occurs when I am trying to use a separate partition with ANY mount point, not just /var . I am using Buildroot to build an embedded linux system. I am trying to use a separate partition for /var, but this occurs for ANY mount point. My init system is systemd, udev for device management. I've edited my fstab to: # <file system> <mount pt> <type> <options> <dump> <pass> /dev/root / ext2 rw,noauto 0 1 /dev/mmcblk0p4 /var ext2 defaults 0 2 proc /proc proc defaults 0 0 devpts /dev/pts

Startup script with systemd in Linux

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问题 Can I do This start up service below, there are no errors showing once run, but the server script below does not run! ln /lib/systemd/aquarium.service aquarium.service systemctl daemon-reload systemctl enable aquarium.service systemctl start aquarium.service thanks aquarium.service: [Unit] Description=Start aquarium server [Service] WorkingDirectory=/home/root/python/code/aquarium/ ExecStart=/bin/bash server.* start KillMode=process [Install] WantedBy=multi-user.target here is the server.sh

Startup script with systemd in Linux

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构建Ssh镜像与Systemctl镜像

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操作步骤 ●下载基础镜像 ●建立工作目录. ●创建并编写Dockerfile文件 ●生成镜像 ●启动容器并修改root密码 ●Build镜像命令具体操作： //创建目录 mkdir sshd cd sshd vim Dockerfile #基于基础的镜像 FROM centos #维护镜像的用户信息 MAINTAINER The CentOS Project <cloud-centos> #安装必要环境包 RUN yum -y update RUN yum -y install openssh* net-tools lsof telnet passwd #给root用户设置密码 RUN echo '123456' | passwd --stdin root #修改配置文件 RUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config #密钥对验证 RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key #开启PAM模块中相应功能 RUN sed -i '/^session\s\+repuired\s\+pam_loginuid.so/s/^/#/' /etc/pam.d/sshd #创建目录并授权赋予权限 RUN mkdir -p /root/.ssh && chown root

Running django channels with daphne on systemd

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问题 First of all, sorry for the long question, I hope a few of you have patience for this. TL; DR: How do I load django settings correctly in systemd? I am following this guide, Deploying Django Channels Using Daphne, so I can run some real-time apps (using WebSockets). Without nginx, and running from the command line the worker (python manage.py runworker) and interface (daphne), I can access the correct channels consumer class, as can be seen in the log below (these were triggered from a

Linux把程序设置成服务运行

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在linux下,把程序设置systemctl服务,并开机启动。以nexus服务为例：进入usr/lib/systemd/system/目录新建nexus.service文件,写入如下内容, 字段说明请百度systemctl服务的字段说明。以nexus服务为例: 进入/usr/lib/systemd/system, 新建nexus.service文件,写入如下内容, 字段说明请百度systemctl服务的字段说明。 …… [Unit] Description=Nexus After=network.target remote-fs.target nss-lookup.target [Service] Type=forking Environment="JAVA_HOME=/usr/java/jdk1.8.0_144" ExecStart=/usr/local/nexus/nexus-3.7.1-02/bin/nexus start ExecStop=/usr/local/nexus/nexus-3.7.1-02/bin/nexus stop [Install] WantedBy=multi-user.target 保存退出,输入：systemctl reload *.service #重新加载服务配置文件。然后就可以启动服务了, systemctl start nexus

CentOS7 安装远程桌面

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yum 源使用是阿里的： https://opsx.alibaba.com/mirror?lang=zh-CN rm -rf /etc/yum.repos.d/* curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 一、桌面环境首先安装桌面环境，这里安装 GNOME。 yum -y groups install "GNOME Desktop" 关于桌面环境相关命令 # 从命令行切换到桌面环境 startx # 获取当前启动模式 systemctl get-default # 修改启动模式为图形化 systemctl set-default graphical.target # 修改启动模式为命令行 systemctl set-default multi-user.target 默认启动桌面环境后以 root 用户自动登录 # 修改配置文件 vi /etc/gdm/custom.conf # 增加如下配置 [daemon] AutomaticLoginEnable=True AutomaticLogin=root 二、远程服务设置 # Windows 远程登录需要安装 Xrdp，需要 epel 源 wget -O /etc/yum.repos.d/epel

利用PXE自动化安装Centos时启动DHCP服务时遇到错误，请求大佬指教

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@利用PXE自动化安装Centos时启动DHCP服务时遇到错误，请求大佬指教 [root@localhost ~]# systemctl start dhcpd.service Job for dhcpd.service failed because the control process exited with error code. See “systemctl status dhcpd.service” and “journalctl -xe” for details. [root@localhost ~]# journalctl -xe Dec 26 19:58:28 localhost.localdomain dhcpd[8177]: on ftp.isc.org. Features Dec 26 19:58:28 localhost.localdomain dhcpd[8177]: have been made to the base Dec 26 19:58:28 localhost.localdomain dhcpd[8177]: it work better with this d Dec 26 19:58:28 localhost.localdomain dhcpd[8177]: 55.0 Dec 26 19:58:28 localhost

linux任务计划cron、chkconfig工具、systemd管理服务、unit介绍和targe

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一、 linux任务计划cron 关于cron任务计划功能的操作都是通过crontab这个命令来完成的。其中常用的选项有： -u ：指定某个用户，不加-u选项则为当前用户； /etc/crontab 任务计划的配置文件前面两行是定义变量，第三行是指发送邮件给谁，然后最后一行有五个点分别对应着五个位，也就是上面的五行，分别表示： 1.表示分钟（0-59） 2.表示小时（0-23） 3.表示日期（1-31） 4.表示月份（1-12可以写数字或者英文的简写） 5.表示星期（0-6，0或者7表示周日，也可以写成英文的简写）最后一行开头部分是用户（在root用户下不写默认就是root）后面部分，也就是com开头的位置是你要执行的命令。 crontab -e定义任务计划（用法和vim一样）从左到右：在12月5日（这一天必须是星期2）的10点01分执行命令 echo “ok” > /root/cron.log 编写格式：分时日月周 user command -l ：列出计划任务； -r ：删除计划任务注： crontab -e 实际上是打开了 “/var/spool/cron/username” （如果是root则打开的是/var/spool/cron/root）这个文件，所以不要直接去编辑那个文件，因为可能会出错，所以一定要使用 crontab -e 来编辑，另外备份的话

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