Linux：systemctl管理开机自启进程

# 查看目录文件
ls /usr/lib/systemd/system/
# 搜索
ls /usr/lib/systemd/system | grep fpm
php-fpm.service

# help
systemctl -h
systemctl -l | grep fpm
systemctl list-unit-files | grep fpm
php-fpm.service                               enabled
# Unit File Commands
# 开机时启动该服务
systemctl enable php-fpm
# 撤销开机启动
systemctl disable php-fpm
# Reenable one or more unit files
systemctl reenable php-fpm php-fpm-8.0.23
# 验证一下是否为开机启动
systemctl is-enabled php-fpm  
# Unit Commands
# Start (activate) one or more units
systemctl start php-fpm
# Show runtime status of one or more units
systemctl status php-fpm
# Reload one or more units
systemctl reload php-fpm
# Start or restart one or more units
systemctl restart php-fpm
# Send signal to processes of a unit
systemctl kill php-fpm
# Stop (deactivate) one or more units
systemctl stop php-fpm
#显示全部已经启动的服务
systemctl list-units --type=service
# Reset failed state for all, one, or more units
systemctl reset-failed

# It's not recommended to modify this file in-place, because it
# will be overwritten during upgrades.  If you want to customize,
# the best way is to use the "systemctl edit" command.
[Unit]
Description=The PHP FastCGI Process Manager
After=network.target
[Service]
Type=simple
PIDFile=/usr/local/php/8.0.24/var/run/php-fpm.pid
ExecStart=/usr/local/php/8.0.24/sbin/php-fpm --nodaemonize --fpm-config /usr/local/php/8.0.24/etc/php-fpm.conf
ExecReload=/bin/kill -USR2 $MAINPID
# Set up a new file system namespace and mounts private /tmp and /var/tmp directories
# so this service cannot access the global directories and other processes cannot
# access this service's directories.
PrivateTmp=true
# Mounts the /usr, /boot, and /etc directories read-only for processes invoked by this unit.
ProtectSystem=full
# Sets up a new /dev namespace for the executed processes and only adds API pseudo devices
# such as /dev/null, /dev/zero or /dev/random (as well as the pseudo TTY subsystem) to it,
# but no physical devices such as /dev/sda.
PrivateDevices=true
# Explicit module loading will be denied. This allows to turn off module load and unload
# operations on modular kernels. It is recommended to turn this on for most services that
# do not need special file systems or extra kernel modules to work.
ProtectKernelModules=true
# Kernel variables accessible through /proc/sys, /sys, /proc/sysrq-trigger, /proc/latency_stats,
# /proc/acpi, /proc/timer_stats, /proc/fs and /proc/irq will be made read-only to all processes
# of the unit. Usually, tunable kernel variables should only be written at boot-time, with the
# sysctl.d(5) mechanism. Almost no services need to write to these at runtime; it is hence
# recommended to turn this on for most services.
ProtectKernelTunables=true
# The Linux Control Groups (cgroups(7)) hierarchies accessible through /sys/fs/cgroup will be
# made read-only to all processes of the unit. Except for container managers no services should
# require write access to the control groups hierarchies; it is hence recommended to turn this on
# for most services
ProtectControlGroups=true
# Any attempts to enable realtime scheduling in a process of the unit are refused.
RestrictRealtime=true
# Restricts the set of socket address families accessible to the processes of this unit.
# Protects against vulnerabilities such as CVE-2016-8655
RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX
# Takes away the ability to create or manage any kind of namespace
RestrictNamespaces=true
[Install]
WantedBy=multi-user.target