centos7 optimize startup items, turn off unnecessary open service
CentOS7 no longer use chkconfig management startup items
Use systemctl list-unit-files you can view the Startup Items
systemctl list-unit-files | grep enable startup items as filter view
abrt-ccpp.service enabled abrt closed bug report is an abbreviation for auto bug report is
ABRT-oops.service Enabled ----------------------
ABRT-vmcore. Enabled ---------------------- Service
ABRT-xorg.service Enabled -------------------- -
abrtd.service Enabled ----------------------
auditd.service Enabled security audit qualifications
autovt @ .service enabled landed relevant reservations
crond.service enabled regular tasks reserved.
dbus-org.freedesktop.NetworkManager.service enabled Desktop management NIC close
org.freedesktop.nm-Enabled dispatcher.service-dbus ----------------------
getty @ .service Enabled TTY console-related reservations
irqbalance.service enabled optimization system interrupt distribution reserved
kdump.service enabled kernel panic information capture custom
microcode.service enabled processor enhanced stability reserved
NetworkManager-dispatcher.service enabled NIC daemon closed
NetworkManager.service enabled ------------- ---------
postfix.service Enabled mail service closed
rsyslog.service enabled logging service reserved
snmpd.service enabled snmp crawl monitoring data retention
sshd.service enabled ssh landing reserved
systemd-readahead-collect.service enabled kernel calls - pre-reading retained
systemd-readahead-drop.service enabled ------------------- ---
systemd-readahead-replay.service Enabled ----------------------
tuned.service Enabled
default.target Enabled default boot entry of multi-user.target soft connection reserved
multi-user.target enabled user start command environment reserved
remote-fs.target enabled remote file mount point for a collection of custom
runlevel2.target enabled operational level for compatibility SysV 6 reserved
runlevel3.target enabled ----- -----------------
runlevel4.target enabled ----------------------
CentOS7 no longer use chkconfig management startup items
Use systemctl list-unit-files you can view the Startup Items
systemctl list-unit-files | grep enable startup items as filter view
abrt-ccpp.service enabled abrt为auto bug report的缩写 用于bug报告 关闭
abrt-oops.service enabled ----------------------
abrt-vmcore.service enabled ----------------------
abrt-xorg.service enabled ----------------------
abrtd.service enabled ----------------------
auditd.service enabled 安全审计 保留
[email protected] enabled 登陆相关 保留
crond.service enabled 定时任务 保留
dbus-org.freedesktop.NetworkManager.service enabled 桌面网卡管理 关闭
dbus-org.freedesktop.nm-dispatcher.service enabled ----------------------
[email protected] enabled tty控制台相关 保留
irqbalance.service enabled 优化系统中断分配 保留
kdump.service enabled 内核崩溃信息捕获 自定
microcode.service enabled 处理器稳定性增强 保留
NetworkManager-dispatcher.service enabled 网卡守护进程 关闭
NetworkManager.service enabled ----------------------
postfix.service enabled 邮件服务 关闭
rsyslog.service enabled 日志服务 保留
snmpd.service enabled snmp监控 数据抓取 保留
sshd.service enabled ssh登陆 保留
systemd-readahead-collect.service enabled 内核调用--预读取 保留
systemd-readahead-drop.service enabled ----------------------
systemd-readahead-replay.service enabled ----------------------
tuned.service enabled
default.target enabled 默认启动项 multi-user.target的软连接 保留
multi-user.target enabled 启动用户命令环境 保留
remote-fs.target enabled 集合远程文件挂载点 自定
runlevel2.target enabled 运行级别 用于兼容6的SysV 保留
runlevel3.target enabled ----------------------
runlevel4.target enabled ----------------------