Gfilui

I have set a static IP on my ubuntu server and I could SSH into the server using the static IP (192.168.178.27). BUt when I use ifconfig command , I see a different IP (192.168.178.24). Moreover, when I run ip addr show, I see two IPs for the same interface (wlp58s0).

How do I rectify this ?

$ ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
 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: eno1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
 link/ether 94:c6:91:14:86:91 brd ff:ff:ff:ff:ff:ff
3: wlp58s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
 link/ether 88:b1:11:99:66:00 brd ff:ff:ff:ff:ff:ff
 inet 192.168.178.24/24 brd 192.168.178.255 scope global dynamic wlp58s0
 valid_lft 85719sec preferred_lft 85719sec
 inet 192.168.178.27/24 brd 192.168.178.255 scope global secondary wlp58s0


$ ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
 inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
 ether 02:42:91:0b:d3:fb txqueuelen 0 (Ethernet)
 RX packets 0 bytes 0 (0.0 B)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 0 bytes 0 (0.0 B)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
 inet 127.0.0.1 netmask 255.0.0.0
 inet6 ::1 prefixlen 128 scopeid 0x10<host>
 loop txqueuelen 1000 (Local Loopback)
 RX packets 123 bytes 9912 (9.9 KB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 123 bytes 9912 (9.9 KB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

wlp58s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.178.24 netmask 255.255.255.0 broadcast 192.168.178.255
 inet6 fe80::bb3e:5309:292d:e32b prefixlen 64 scopeid 0x20<link>
 ether 88:b1:11:99:66:00 txqueuelen 1000 (Ethernet)
 RX packets 14904 bytes 21544564 (21.5 MB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 2030 bytes 244273 (244.2 KB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Content of /etc/network/interfaces:

# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
# Generated by debian-installer.

# The loopback interface
auto lo
iface lo inet loopback

auto wlp58s0
iface wlp58s0 inet static
address 192.168.178.27
netmask 255.255.255.0
gateway 192.168.178.1
dns-nameservers 8.8.8.8 8.8.4.4

Content of netconf:

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
 version: 2
 renderer: networkd
 ethernets:
 wlp58s0:
 dhcp4: yes
 addresses: [192.168.178.27/24]
 gateway4: 192.168.178.1
 nameservers:
 addresses: [8.8.8.8,8.8.4.4]

Your configurations are not working as expected because wireless interfaces need to be directed to connect to a specific SSID and to provide the WPA2 password. Neither your /etc/network/interfaces nor your netplan configuration do so. Also, your netplan says dhcp4:yes when, in fact, you specify a static IP. You also specify ethernets when wlp58s0 is wireless; it should be wifis.

Frankly, if Network Manager is running, I'd remove the settings altogether from /etc/network/interfaces and return netplan to its usual configuration. That is, rename to file you currently have to: /etc/netplan/01-network-manager-all.yaml. Then return it to its default wording:

# Let NetworkManager manage all devices on this system
network:
 version: 2
 renderer: NetworkManager

If you wish, instead, to try netplan, and you are running Ubuntu 17.10 or later, then I'd remove all the wlp58s0 settings from /etc/network/interfaces and edit netplan to:

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
 version: 2
 renderer: networkd
 wifis:
 wlp58s0:
 dhcp4: no
 addresses: [192.168.178.27/24]
 gateway4: 192.168.178.1
 nameservers:
 addresses: [8.8.8.8,8.8.4.4]
 access-points: 
 "your_router":
 password: "your_wpa2_password"

Please note and follow the spacing and indentation. Also note that the SSID and password are in quotes ". Next, run:

sudo netplan apply

Reboot. Any improvement?