How to check IP address in linux server

Finding the Private IP Address

1. Using ip command:

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ip addr

Or to get a more concise output for a specific interface (e.g., eth0):

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ip a show eth0

For IPv4 only:

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ip -4 addr show eth0

For IPv6 only:

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ip -6 addr show eth0

2. Using ifconfig (Deprecated, but still useful in some systems):

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ifconfig

To get details of a specific interface:

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ifconfig eth0

3. Using hostname command:

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hostname -I

4. Using nmcli command (for systems using NetworkManager):

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nmcli -p device show

Finding the Public IP Address

1. Using curl command:

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curl ifconfig.me

Other services you can use with curl:

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curl ipinfo.io/ip
curl api.ipify.org
curl icanhazip.com

2. Using dig command:

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dig +short myip.opendns.com @resolver1.opendns.com

These methods cover different ways to check both the private and public IP addresses on a Linux server. You can choose the command based on your preferences and the tools available on your system.