mirror of
https://github.com/LCTT/TranslateProject.git
synced 2025-01-01 21:50:13 +08:00
153 lines
5.0 KiB
Markdown
153 lines
5.0 KiB
Markdown
|
Basics Of NetworkManager Command Line Tool, Nmcli
|
|||
|
|
================================================================================
|
|||
|
|
|
|||
|
|
|
|||
|
|
### Introduction ###
|
|||
|
|
|
|||
|
|
In this tutorial, we will discuss NetworkManager command line tool, aka **nmcli**, in CentOS / RHEL 7. Users who are using **ifconfig** should avoid this command in Centos 7.
|
|||
|
|
|
|||
|
|
Lets configure some networking settings with nmcli utility.
|
|||
|
|
|
|||
|
|
#### To get all address information of all interfaces connected with System ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# ip addr show
|
|||
|
|
|
|||
|
|
**Sample Output:**
|
|||
|
|
|
|||
|
|
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
|
|||
|
|
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
|
|||
|
|
inet 127.0.0.1/8 scope host lo
|
|||
|
|
valid_lft forever preferred_lft forever
|
|||
|
|
inet6 ::1/128 scope host
|
|||
|
|
valid_lft forever preferred_lft forever
|
|||
|
|
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
|
|||
|
|
link/ether 00:0c:29:67:2f:4c brd ff:ff:ff:ff:ff:ff
|
|||
|
|
inet 192.168.1.51/24 brd 192.168.1.255 scope global eno16777736
|
|||
|
|
valid_lft forever preferred_lft forever
|
|||
|
|
inet6 fe80::20c:29ff:fe67:2f4c/64 scope link
|
|||
|
|
valid_lft forever preferred_lft forever
|
|||
|
|
|
|||
|
|
#### To retrieve packets statistics related with connected interfaces ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# ip -s link show eno16777736
|
|||
|
|
|
|||
|
|
**Sample Output:**
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
#### Get routing configuration ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# ip route
|
|||
|
|
|
|||
|
|
Sample Output:
|
|||
|
|
|
|||
|
|
default via 192.168.1.1 dev eno16777736 proto static metric 100
|
|||
|
|
192.168.1.0/24 dev eno16777736 proto kernel scope link src 192.168.1.51 metric 100
|
|||
|
|
|
|||
|
|
#### Analyze path for some host/website ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# tracepath unixmen.com
|
|||
|
|
|
|||
|
|
Output will be just like traceroute but in more managed form.
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
### nmcli utility ###
|
|||
|
|
|
|||
|
|
**Nmcli** is a very rich and flexible command line utility. some of the terms used in nmcli are:
|
|||
|
|
|
|||
|
|
- **Device** – A network interface being used.
|
|||
|
|
- **Connection** – A set of configuration settings, for a single device you can have multiple connections, you can switch between connections.
|
|||
|
|
|
|||
|
|
#### Find out how many connections are available for how many devices ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection show
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
#### Get details of a specific connection ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection show eno1
|
|||
|
|
|
|||
|
|
**Sample output:**
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
#### Get the Network device status ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli device status
|
|||
|
|
|
|||
|
|
----------
|
|||
|
|
|
|||
|
|
DEVICE TYPE STATE CONNECTION
|
|||
|
|
eno16777736 ethernet connected eno1
|
|||
|
|
lo loopback unmanaged --
|
|||
|
|
|
|||
|
|
#### Create a new connection with “dhcp” ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection add con-name "dhcp" type ethernet ifname eno16777736
|
|||
|
|
|
|||
|
|
Where,
|
|||
|
|
|
|||
|
|
- **Connection add** – To add new connection
|
|||
|
|
- **con-name** – connection name
|
|||
|
|
- **type** – type of device
|
|||
|
|
- **ifname** – interface name
|
|||
|
|
|
|||
|
|
This command will add connection with dhcp protocol.
|
|||
|
|
|
|||
|
|
**Sample output:**
|
|||
|
|
|
|||
|
|
Connection 'dhcp' (163a6822-cd50-4d23-bb42-8b774aeab9cb) successfully added.
|
|||
|
|
|
|||
|
|
#### Instead of assigning an IP via dhcp, you can add ip address as “static” ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection add con-name "static" ifname eno16777736 autoconnect no type ethernet ip4 192.168.1.240 gw4 192.168.1.1
|
|||
|
|
|
|||
|
|
**Sample Output:**
|
|||
|
|
|
|||
|
|
Connection 'static' (8e69d847-03d7-47c7-8623-bb112f5cc842) successfully added.
|
|||
|
|
|
|||
|
|
**Update connection:**
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection up eno1
|
|||
|
|
|
|||
|
|
Again Check, whether ip address is changed or not.
|
|||
|
|
|
|||
|
|
[root@localhost ~]# ip addr show
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
#### Add DNS settings to Static connections. ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection modify "static" ipv4.dns 202.131.124.4
|
|||
|
|
|
|||
|
|
#### Add additional DNS value. ####
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection modify "static" +ipv4.dns 8.8.8.8
|
|||
|
|
|
|||
|
|
**Note**: For additional entries **+** symbol will be used and **+ipv4.dns** will be used instead on **ip4.dns**
|
|||
|
|
|
|||
|
|
Put an additional ip address:
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection modify "static" +ipv4.addresses 192.168.200.1/24
|
|||
|
|
|
|||
|
|
Refresh settings using command:
|
|||
|
|
|
|||
|
|
[root@localhost ~]# nmcli connection up eno1
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
You will see, setting are effective now.
|
|||
|
|
|
|||
|
|
That’s it.
|
|||
|
|
|
|||
|
|
--------------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
via: http://www.unixmen.com/basics-networkmanager-command-line-tool-nmcli/
|
|||
|
|
|
|||
|
|
作者：Rajneesh Upadhyay
|
|||
|
|
译者：[译者ID](https://github.com/译者ID)
|
|||
|
|
校对：[校对者ID](https://github.com/校对者ID)
|
|||
|
|
|
|||
|
|
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
|