The first thing I noticed was /etc/inittab file is different from the Linux version. However, runlevel are quite identical
Default Solaris Run Level
• S : Single user state (useful for recovery)
• 0 : Access Sun Firmware ( ok> prompt)
• 1 : System administrator mode
• 2 : Multi-user w/o NFS
• 3 : Multi-user with NFS
• 4 : Unused
• 5 : Completely shutdown the host (like performing a power-off @ OBP)
• 6 : Reboot but depend upon initdefault entry in /etc/inittab
Solaris 8/9 Find out runlevel
To find out current runlevel use who command:
$ who -r
Output:
. run-level 3 Mar 3 14:04 3 0 S
Solaris changing runlevels after bootup
You need to use init command, for example change runlevel to 2.
# /sbin/init 2
Solaris changing the default runlevel
An entry with initdefault (in /etc/inittab file) is scanned only when init is initially invoked. init uses this entry to determine which run level to enter initially.
Open /etc/inittab file:
# vi /etc/inittab
Find out this entry:
is:3:initdefault:
Change is:3 to number you want, don't use S, 0, 6 ;). Save file.
* Only init states 0, 1, 5, 6, and S can be reached using shutdown.
sudo is available from the SFWsudo package on Solaris 10.
To use it a /etc/sudoers file has been set but still leading to the following error
user NOT in sudoers
Hopefully, truss will help :-)
root@server:/# truss -o /tmp/output sudo ls
The /tmp/output file is answering the enigma:
root@server:/# grep sudoers /tmp/output
lstat("/opt/sfw/etc/sudoers", 0xFFBFFB28) = 0
open("/opt/sfw/etc/sudoers", O_RDONLY) = 4
The sudoers file to edit is in /opt/sfw/etc
Most of us encountered to increase the limit of file descriptors while installing a high end 3pp(party product).In doing so we will encounter with two different kinds of limits i.e.soft vs hard.
Hard limits are a kernel-configurable item and users can't exceed them. Soft limits are the user defaults and users can change that using the ulimit command.
Basically, soft limits can be changed to anything up to the hard limit. Soft limits are warning barrier. When a user reaches the soft limit they will get an warning message but are still allowed to use more space up to the hard limit.
Since its a kernel tunable we have to define the value in /etc/system and /etc/sysctl.conf for Pre-Solaris 10 and Linux respectively.
E.g.,
To set a hard limit of 4096 and soft limit of 1024 in Solaris 8.
set rlim_fd_max=4096 [Refers Hard limit]
set rlim_fd_cur=1024 [Refers Soft limit]
To raise the allowed limit in Linux based distributions update either /etc/limits.conf or /etc/security/limits.conf
