# ubuntu 18.04 安裝、設定開機執行(screen)

###### tags: `Ubuntu` `Linux` `screen`

灌好ubuntu後，先執行(要確認可以連上網後)

$sudo apt-get update

安裝ssh 讓ubuntu可以遠端登入

$sudo apt-get install openssh-server
$sudo service ssh restart

安裝vim 比較好編輯文字

$sudo apt-get install vim

## 建立開機自動啟動腳本
1、建立rc-local.service文件

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

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

2、創建文件rc.local

sudo vim /etc/rc.local

內容

#!/bin/bash
#
# 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
screen -dmS felix
screen -S felix -X stuff "cd /var/opt/felix-framework-6.0.1/ ^M"
screen -S felix -X stuff "java -jar bin/felix.jar ^M"
exit 0

3、給rc.local加上權限

sudo chmod +x /etc/rc.local

4、啟用服務

sudo systemctl enable rc-local

5、啟動服務並檢查狀態

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

## 注意事項
1.rc.loacl腳本的screen enter才會執行動作，所以指令後要加上 ^M

terminal 上打 Crtl+v Enter 出來的是^M