In this Post, we will show Old and New linux network commands that would help you configure or troubleshoot network-related problems in Linux.
Old Command
ifconfig -a
ifconfig (interface configurator) is basic and commonly used commands for finding network details on Linux system. It is also used to configure network interface parameters. We can use this command to get the IP address, MAC address, etc.
Interface Down command
Run the below command to bring down the enp0s3 interface in the system.
- # ifconfig enp0s3 down
Interface UP command
Run the below command to bring up the enp0s3 interface in the system.
- # ifconfig enp0s3 up
IP address Add command
Run the below command to add the IP address on linux server online.
- # ifconfig enp0s3 192.168.56.104
Netmask Add command
Run the below command to add the netmask address on linux server online.
- # ifconfig enp0s3 netmask 255.255.255.0
Virtual IP Address Add command
Run below command to add Virtual IP Address in Linux operating systems.
- # ifconfig enp0s3:1 192.168.56.105 netmask 255.255.255.0
Run the below command to show network status and protocol statistics. This command will be display the status of TCP and UDP endpoints in table format, routing table information, and interface information.
- # netstat
- # netstat -tulpn
- # netstat -neopa
- # netstat -g
Route
Run the below command to show routing table. Route command will help you to view, add and delete IP routing table in Linux.
- # route
Below command is route add command.
- # route add -net 192.168.56.0 netmask 255.255.255.0 dev enp0s3
Below command is add default getway via route.
- # route add default gw 192.168.56.1
Below command will help you to remove static route.
- # route delete 192.168.56.255 netmask 255.255.255.0 192.168.56.1
New Command
ip a
Now days we are using “ip a” commands for finding network details on Linux system. It is also used to configure network interface parameters. We can use this command to get the IP address, MAC address, etc.
Interface Down new command
Run the below command to bring down the enp0s3 interface in the system.
- # ip link set enp0s3 down
Interface UP new command
Run the below command to bring up the enp0s3 interface in the system.
- # ip link set enp0s3 up
IP address Add new command
Run the below command to add the IP address on linux server online.
- # ip addr add 192.168.56.104/24 dev enp0s3
Virtual IP Address Add new command
Run below command to add Virtual IP Address in Linux operating systems.
- # ip addr add 192.168.56.105/24 dev enp0s3
Netstat
Run the below command to show network status and protocol statistics. This command will be display the status of TCP and UDP endpoints in table format, routing table information, and interface information.
- # ss
- # ss -tulpn
- # ss -neopa
- # ss -g
Route
Run the below command to show routing table. Route command will help you to view, add and delete IP routing table in Linux.
- # route
Below command is route add command.
- # ip route add 192.168.56.0/24 dev enp0s3
Below command is add default getway via route.
- # ip route add default via 192.168.56.1
Below command will help you to remove static route.
- # ip route delete 192.168.56.1
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