我想问一下linux如何上电启动, 现在我一上电, 要先输入root才能进去系统

目前上电就会启动系统。

这是对应的截图, 我现在就想不输入root, 上电自动进入root, 或者如何做到上电启动某个程序

在ls /etc/init.d/ 目录下面找个文件追加上你的程序就可以了；比如 /etc/init.d/S99showversion

[root@canaan /etc/init.d ]#cat /etc/init.d/S99showversion 
#!/bin/sh
cat /etc/version/release_version
[root@canaan /etc/init.d ]#

[root@canaan /etc/init.d ]#pwd
/etc/init.d
[root@canaan /etc/init.d ]#ls -lh
total 31K    
-rwxr-xr-x    1 root     root         473 Apr 21 13:08 S00resizemmc
-rwxr-xr-x    1 root     root         674 Apr 21 13:08 S01mdev
-rwxr-xr-x    1 root     root        1.2K May  6 04:23 S01seedrng
-rwxr-xr-x    1 root     root        1.2K May  6 04:16 S01syslogd
-rwxr-xr-x    1 root     root        1004 May  6 04:16 S02klogd
-rwxr-xr-x    1 root     root        2.7K May  6 04:15 S02sysctl
-rwxr-xr-x    1 root     root        1.6K May  6 04:11 S30dbus
-rwxr-xr-x    1 root     root         357 Apr 21 13:08 S31canaan_isp
-rwxr-xr-x    1 root     root        1.3K May  6 04:12 S40bluetoothd
-rwxr-xr-x    1 root     root         155 May 20 03:23 S40k230_canmv_01studio_defconfig
-rwxr-xr-x    1 root     root         632 Apr 21 13:08 S40network
-rwxr-xr-x    1 root     root        2.7K Apr 21 13:08 S41adb_mtp
-rwxr-xr-x    1 root     root        1.2K May  6 04:15 S48sntp
-rwxr-xr-x    1 root     root         918 May  6 04:15 S49ntp
-rwxr-xr-x    1 root     root        1.2K May  6 04:16 S50crond
-rwxr-xr-x    1 root     root        1.2K May  6 04:22 S50sshd
-rwxr-xr-x    1 root     root         614 May  6 04:16 S50telnet
-rwxr-xr-x    1 root     root          43 Apr 21 13:08 S99showversion
-rwxr-xr-x    1 root     root         423 May  6 04:21 rcK
-rwxr-xr-x    1 root     root         408 May  6 04:21 rcS
[root@canaan /etc/init.d ]#