ubuntu-18.04 設置開機啟動腳本

ubuntu-18+ 不能通過編輯rc.local來設置開機啟動腳本，通過下列簡單設置后，可以使rc.local重新發揮作用。

1.建立rc-local.service文件

sudo vi /etc/systemd/system/rc-local.service

2.將下列內容復制進rc-local.service文件

[Unit]
Description=/etc/rc.local Compatibility
ConditionPathExists=/etc/rc.local
 
[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
StandardOutput=tty
RemainAfterExit=yes
SysVStartPriority=99
 
[Install]
WantedBy=multi-user.target

3.創建文件rc.local

sudo vi /etc/rc.local

將下列內容復制進rc.local文件

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
echo "看到這行字，說明添加自啟動腳本成功。" > /usr/local/test.log
exit 0

4.給rc.local加上權限,啟用服務

sudo chmod +x /etc/rc.local
sudo systemctl enable rc-local

啟動服務並檢查狀態

sudo systemctl start rc-local.service
sudo systemctl status rc-local.service

5.重啟並檢查test.log文件

cat /usr/local/test.log