The following run levels are specified for use by the "Default-Start:"
and "Default-Stop:" specifiers as defined by the section Comment Conventions for Init Scripts. Many LSB
run-time environments commonly use these run level definitions, and in
the absence of other considerations, providers of run-time
environments are strongly encouraged to follow this convention to
provide consistency for system administrators who need to work with
multiple distributions. However, it is not required that
LSB-compliant run-time environments use these run levels; the
distribution-provided install_initd
script may map the run levels
specified below to whatever distribution-specified run levels are most
appropriate.
0 | halt |
1 | single user mode |
2 | multiuser with no network services exported |
3 | normal/full multiuser |
4 | reserved for local use, default is normal/full multiuser |
5 | multiuser with xdm or equivalent |
6 | reboot |