24.5. 使用 systemd 单元文件调度作业在下一次引导时运行

~]# cat /etc/systemd/system/one-time.service
[Unit]
# The script needs to execute after:
network interfaces are configured
Wants=network-online.target
After=network-online.target
all remote filesystems (NFS/_netdev) are mounted
After=remote-fs.target
name (DNS) and user resolution from remote databases (AD/LDAP) are available
After=nss-user-lookup.target nss-lookup.target
the system clock has synchronized
After=time-sync.target

[Service]
Type=oneshot
ExecStart=/usr/local/bin/foobar.sh

[Install]
WantedBy=multi-user.target

~]# cat /etc/systemd/system/one-time.service
[Unit]
# The script needs to execute after:
# network interfaces are configured
Wants=network-online.target
After=network-online.target
# all remote filesystems (NFS/_netdev) are mounted
After=remote-fs.target
# name (DNS) and user resolution from remote databases (AD/LDAP) are available
After=nss-user-lookup.target nss-lookup.target
# the system clock has synchronized
After=time-sync.target

[Service]
Type=oneshot
ExecStart=/usr/local/bin/foobar.sh

[Install]
WantedBy=multi-user.target

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/bin/foobar.sh

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/bin/foobar.sh

systemctl daemon-reload

~]# systemctl daemon-reload

systemctl enable one-time.service

~]# systemctl enable one-time.service

~]# cat /usr/local/bin/foobar.sh
#!/bin/bash

touch /root/test_file

~]# cat /usr/local/bin/foobar.sh
#!/bin/bash

touch /root/test_file

#!/bin/bash

touch /root/test_file
systemctl disable one-time.service

#!/bin/bash

touch /root/test_file
systemctl disable one-time.service

chmod +x /usr/local/bin/foobar.sh

~]# chmod +x /usr/local/bin/foobar.sh