HOST NAME CONFIGURATION
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v Stub resolver
The stub resolver is used to resolver host
name into IP address and reserve. By default, the contents of the /etc/hostname file are checked first.
§
Default location
/etc/hostname
§
To check Hostname
#
Hostnamectl ↵
or
#
hostnamectl
status ↵
v Types of Host name
§
Static Hostname
§
Dynamic Hostname
§
Pretty Hostname
§
Static
Hostname:- Assigned
by system admin. For example, srv1, srv2, srv.mysolution.com.
§
Dynamic
Hostname:- Assigned
by DHCP.
§
Pretty
Hostname:- Assigned
by system admin / end–users and it is a free form UTFB hostname for presentation
to the user. For example, “Jetking PC”.
v
How
can we set the Hostname.
#
hostnamectl ɸ set-hostname ɸ (your new hostname
here) ↵
#
hostnamectl ɸ set-hostname ɸ “(your new hostname here)” ɸ - pretty ↵
#
hostnamectl ɸ set-hostname ɸ (your new hostname here) ɸ - static ↵
#
hostnamectl ɸ set-hostname ɸ (your new hostname here) ɸ - - transient ↵
v How can remove Hostname.
#
hostnamectl ɸ set-hostname ɸ “ ” ɸ -
pretty ↵
#
hostnamectl ɸ set-hostname ɸ “ ” ɸ -
static ↵
#
hostnamectl ɸ set-hostname ɸ “ ” ɸ - - transient ↵
v How to change Hostname remotely.
#
ssh ɸ root@ (server ip) ɸ hostnamectl ɸ set-hostname ɸ SRV1 ↵
or
#
hostnamectl ɸ set-hostname ɸ SRV2 ɸ –H ɸ root@ (user ip) ↵
v
To
check mac-address and interface name.
#
ip ɸ link ↵
v
To
check ip address and network for all interfaces.
#
ip ɸ addr ↵
#
if ɸ ifconfig ↵
v
Tracing
routes taken by Traffic.
traceroute or tracepath is a command line tool to
check path between source host to destination host.
§
For IPv4
#
tracepath ɸ google.com
↵
§
For IPv6
#
tracepath6 ɸ 2001:db8:0:2:451
↵
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