Linux Command Line Reference
Show the IP Address
ip address show # Show only the addresses. ip address show | grep inet
Network Manager
Manjaro uses the RedHat NetworkManager suite to manage network interfaces. The command-line tool is nmcli.
List Interfaces and Status
Use the nmcli command with no arguments to list the interfaces and status.
For example, below, the enp4s0 device is connected and using the "Wired connection 1" connection. A "connection" is a group of settings in NetworkManager. The IP address is 172.16.0.14.
nmcli
enp4s0: connected to Wired connection 1
"Marvell 88E8056"
ethernet (sky2), 00:26:18:52:64:7B, hw, mtu 1500
ip4 default, ip6 default
inet4 172.16.0.14/16
route4 172.16.0.0/16 metric 100
route4 default via 172.16.1.254 metric 100
inet6 2600:1700:1e80:7880::2f/128
inet6 2600:1700:1e80:7880:fb86:cb6f:ecef:936a/64
inet6 fe80::ac6:af13:8796:70c9/64
route6 fe80::/64 metric 1024
route6 2600:1700:1e80:7880::/64 metric 100
route6 2600:1700:1e80:7880::/60 via fe80::4e12:65ff:fe6c:7620 metric 100
route6 2600:1700:1e80:7880::2f/128 metric 100
route6 default via fe80::4e12:65ff:fe6c:7620 metric 100
enp5s0: unavailable
"Marvell 88E8056"
ethernet (sky2), 00:26:18:52:64:7C, hw, mtu 1500
wlp1s0: unavailable
"Intel 7260"
wifi (iwlwifi), DA:B3:7C:5D:1F:C8, sw disabled, hw, mtu 1500
lo: unmanaged
"lo"
loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
DNS configuration:
servers: 172.16.1.254
domains: attlocal.net
interface: enp4s0
servers: 2600:1700:1e80:7880::1
domains: attlocal.net
interface: enp4s0
Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.
Consult nmcli(1) and [PwshNotes Edit] manual pages for complete usage details.
List Connections
NetworkManager is organized around "connections". NetworkManager connections are groups of settings which can be saved and applied to a device. A device is just your network card.
You can list the available connections with nmcli connection show.
For example, below, the connections are "Wired connection 1" and "Wired connection 2". And Wired connection 1 is applied to the "enp4s0" device (network card).
nmcli connection show NAME UUID TYPE DEVICE Wired connection 1 a722df7b-a8b1-32ad-8b18-a694919a8d03 ethernet enp4s0 Wired connection 2 03c99f3b-d2b5-3b5d-8b8f-2e0ec4bf182f ethernet --
Renew DHCP Lease
Renew the DHCP lease with the nmcli device up ifname command.
Since we're renewing the DHCP lease, I will choose the device that is already connected.
# List the current IP address.
nmcli | grep inet
inet4 172.16.0.14/16
inet6 2600:1700:1e80:7880::2f/128
inet6 2600:1700:1e80:7880:fb86:cb6f:ecef:936a/64
inet6 fe80::ac6:af13:8796:70c9/64
# List the devices.
nmcli device status
DEVICE TYPE STATE CONNECTION
enp4s0 ethernet connected Wired connection 1
enp5s0 ethernet unavailable --
wlp1s0 wifi unavailable --
lo loopback unmanaged --
# Renew the IP address and include the device name.
nmcli device up enp4s0
Device 'enp4s0' successfully activated with 'a722df7b-a8b1-32ad-8b18-a694919a8d03'.
# Check the new IP address.
nmcli | grep inet
inet4 192.168.1.51/24
inet6 2600:1700:1e80:7880::2f/128
inet6 2600:1700:1e80:7880:fb86:cb6f:ecef:936a/64
inet6 fe80::ac6:af13:8796:70c9/64
List File System Types
Here we can see that my hard drives (/dev/sdX) are both using EXT4.
df -Th Filesystem Type Size Used Avail Use% Mounted on dev devtmpfs 12G 0 12G 0% /dev run tmpfs 12G 1.9M 12G 1% /run /dev/sda1 ext4 916G 46G 824G 6% / tmpfs tmpfs 12G 147M 12G 2% /dev/shm tmpfs tmpfs 12G 8.2M 12G 1% /tmp /dev/sdb ext4 458G 9.2G 425G 3% /data tmpfs tmpfs 2.4G 108K 2.4G 1% /run/user/1000
Reboot
shutdown -r 0
Restart the Print Queue
Sometimes documents get stuck in my print queue after waking from sleep. The solution is to restart the print service: CUPS. My Linux distribution, Manjaro, uses systemctl to manage services.
sudo systemctl restart cups
You can check the status of the local queue by visiting the web server for CUPS.
Though, I believe version 3.0 of CUPS will have a new interface besides the web server.
netstat
netstat has been replaced with ss Here is the basic usage.
# Display all TCP sockets. ss -t -a State Recv-Q Send-Q Local Address:Port Peer Address:Port ... TIME-WAIT 0 0 192.168.1.68:45552 34.117.237.239:https ESTAB 0 0 192.168.1.68:34660 104.16.122.175:https ESTAB 0 0 192.168.1.68:52806 34.117.237.239:https ...
References
If you’re still using ifconfig, you’re living in the past | Ubuntu
Linux Force DHCP Client (dhclient) to Renew IP Address - nixCraft
How to Show File System Type in Linux
CUPS 3.0 Continues Being Crafted To Overhaul Linux Printing | Phoronix
How to Use the ss Command on Linux | How-to Geek
Created: Thursday, June 16, 2022
Updated: Tuesday, March 12, 2024
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