【linux】设置开启自启脚本时问题

linux开启自启

/etc/rc.d/rc.local
脚本不生效。

查询攻略，说是脚本问题、时序问题等等，排除脚本问题，然后使用

journalctl -u rc-local.service
命令，查询开启自启报错日志

-- Logs begin at Thu 2023-12-14 16:07:48 CST, end at Thu 2023-12-14 16:08:56 CST. --
Dec 14 16:08:01 localhost.localdomain systemd[1]: Starting /etc/rc.d/rc.local Compatibility...
Dec 14 16:08:04 localhost.localdomain rc.local[1238]: Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
Dec 14 16:08:04 localhost.localdomain rc.local[1238]: At least one of these environment variable is needed to run this program
Dec 14 16:08:04 localhost.localdomain systemd[1]: rc-local.service: control process exited, code=exited status=1
Dec 14 16:08:04 localhost.localdomain systemd[1]: Failed to start /etc/rc.d/rc.local Compatibility.
Dec 14 16:08:04 localhost.localdomain systemd[1]: Unit rc-local.service entered failed state.
Dec 14 16:08:04 localhost.localdomain systemd[1]: rc-local.service failed.

忽略了第二行和第三行，从第三行查起，没查出什么，然后从第二行查起，说是缺少环境变量，查了下/etc/profile，有变量

说是时序问题，然后在rc.local的每个脚本命令前打印日志，也还是没发现问题，然后调了下jdk中JAVA_HOME在path的位置，放在前面了

#export PATH=$PATH:$JAVA_HOME/bin
export PATH=$JAVA_HOME/bin:$PATH

再在每个脚本后面打印日志，发现问题解决了，可能就是时序问题