LINUX-general Linux technology-Linux technology and application information. For more information, see the following section. In the/etc/rc. d directory, there are some files starting with rcX. d, which X indicates the number indicates the running level. 0 indicates shutdown, 1-5 indicates normal, and 6 indicates restart. Therefore, if you want the system to execute a task when the system is ON/OFF, write a standard service script, put it in/etc/init. d directory, and then go to the corresponding rc. d/rcX. d directory to create a link pointing to this script, you can be executed at the corresponding running level.
In addition, you can copy some standard service scripts of the system, change them by yourself, and use the chkconfig -- add command to add them.
UBUNTU can use sudo/usr/sbin/update-rc.d sshd start 0123 stop 456 to make the sshd service run at level 0123 and stop at level 456.
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