Skybox version 8.5.400
35
Chapter 12
Skybox Appliance for ISO version 8.5.xxx uses CentOS 7 (earlier versions used
CentOS 6).
The major changes from CentOS 6 to CentOS 7 relevant to Skybox Appliance are
summarized in the following table.
Features
CentOS 7
CentOS 6
Kernel version
3.10.x-x kernel
2.6.x-x Kernel
General availability
date of 1st major
release
2014-06-09 (Kernel Version 3.10.0-123) 2010-11-09 (Kernel Version
2.6.32-71)
First process
systemd (process ID 1)
init (process ID 1)
Runlevel
Runlevels are named targets as shown
below:
•
runlevel0.target
poweroff.target
•
runlevel1.target
rescue.target
•
runlevel2.target
multi-user.target
•
runlevel3.target
multi-user.target
•
runlevel4.target
multi-user.target
•
runlevel5.target
graphical.target
•
runlevel6.target
reboot.target
/etc/systemd/system/default.target
(this is linked to the multi-user target by
default)
Traditional runlevels
defined:
•
runlevel 0
•
runlevel 1
•
runlevel 2
•
runlevel 3
•
runlevel 4
•
runlevel 5
•
runlevel 6
The default runlevel is set in
/etc/inittab
.
Host name change In Red Hat Enterprise Linux 7, as part of
the move to the new init system
(systemd), the
hostname
variable is set
in
/etc/hostname
In Red Hat Enterprise Linux
6, the
hostname
variable is
set in the
/etc/sysconfig/network
configuration file.
Change network
card name
Naming convention: eth0, eth1, and so
on
Naming convention based
on BIOS location and other
parameters.
For example, ens0s01,
enp02, eno1
Change in UID
allocation
Default UID assigned to users starts
from 1000.
This can be changed in
/etc/login.defs
Default UID assigned to
users starts from 500.
This can be changed in
/etc/login.defs
Change in file
system structure
/bin
,
/sbin
,
/lib
, and
/lib64
are now
nested under
/usr
/bin
,
/sbin
,
/lib
, and
/lib64
are usually under
/
Change log
