it(8)it(8)NAMEit - configure a system after installation
SYNOPSIS
/sbin/it
DESCRIPTION
The it program executes scripts before transferring control of the sys‐
tem to the user, typically before the first user logs in. The it pro‐
gram executes programs that collect information such as system name,
passwords, timezone, and current date.
A system can be in a run level at any given time; each run level has a
specific group of processes that run at that level. The init program
operates in one of four run levels: 0, s, 2, or 3. The run level
changes when init is invoked by a privileged user. The it program is
run from /etc/inittab whenever the system is booted or rebooted, or
when a level transition occurs for some other reason, such as within
init3. The it program first determines which run level the system is
coming up under. Next it turns on shared libraries and swap and then
searches for any /sbin/it.d/run-level directories, where run-level
names a system run level; for example, 2.d, 3.d, 23.d, and so forth.
If any such directories exist, it collects the names of all files in
those directories. These files are typically links to files in the
/sbin/it.d/bin directory and are created beforehand by itruns(8). After
collecting the file names, it sorts them, eliminates duplicate refer‐
ences, orders the names as specified by the data file
/sbin/it.d/data/options.mask, executes the files, and finally removes
the files it executed. After all the files collected from the run
level directories have been handled, it exits.
The /sbin/it.d/data/options.mask file contains a single line with a
list of file names separated by colons. The it command executes col‐
lected files in the order in which they appear from left to right in
the options.mask file. Programs not listed in the options.mask file
are executed after those defined in options.mask. These “unspecified”
programs are run in the order into which they were initially sorted;
that order is controlled by the LC_COLLATE environmental variable and
the specifications in the /usr/lib/nls/loc/locale files.
FILES
Specifies execution priorities of files to be run by it Files to be
linked by itruns(8) for execution by itSEE ALSO
Commands: init(8), itruns(8), rc0(8), rc2(8), rc3(8), who(1)it(8)