On Tue, May 15, 2018 at 12:40 PM, Nicolas Kovacs <info at microlinux.fr> wrote: > Hi, > > I'm running CentOS on all kinds of setups: servers, workstations, > desktops and laptops. > > Up until now, I'm only using NetworkManager on laptops, since it makes > sense to use it there. On servers and desktop clients, I usually remove > it and configure the network "traditionally" by simply editing > /etc/sysconfig/network-scripts/ifcfg-whatever, /etc/resolv.conf, > /etc/hosts, /etc/hostname and /etc/sysconfig/network. Running > NetworkManager on anything else than a laptop has never made any sense > to me, since it's basically an extra layer of abstraction. > > With the latest update, the removal of NetworkManager on a desktop > client isn't possible anymore, since 'yum remove NetworkManager' also > tries to remove 'gdm', and disabling it on startup spews back all sorts > of errors. > > If you folks at Red Hat are reading this, I have one question: WHY ? > > Niki Kovacs > Disclosure: I'm not a folk at Red Hat ;-) In CentOS / Fedora I simply disable NetworkManager service and put into ifcfg-xxx (eg ifcfg-eth0) the line NM_CONTROLLED=no The network service is enabled by default, so this should be sufficient to keep NetworkManager installed but not inerfering with your classic network configuration. On a just updated c7test vm [root at c7test ~]# uptime 13:19:51 up 2 min, 1 user, load average: 0.10, 0.15, 0.07 [root at c7test ~]# [root at c7test ~]# cat /etc/centos-release CentOS Linux release 7.5.1804 (Core) [root at c7test ~]# [root at c7test ~]# systemctl status NetworkManager ● NetworkManager.service - Network Manager Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled) Active: inactive (dead) Docs: man:NetworkManager(8) [root at c7test ~]# systemctl status network -l ● network.service - LSB: Bring up/down networking Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled) Active: active (exited) since Tue 2018-05-15 13:17:27 CEST; 15s ago Docs: man:systemd-sysv-generator(8) Process: 700 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS) May 15 13:17:21 c7test.mydomain systemd[1]: Starting LSB: Bring up/down networking... May 15 13:17:23 c7test.mydomain network[700]: Bringing up loopback interface: [ OK ] May 15 13:17:27 c7test.mydomain NET[1001]: /etc/sysconfig/network-scripts/ifup-post : updated /etc/resolv.conf May 15 13:17:27 c7test.mydomain network[700]: Bringing up interface eth0: [ OK ] May 15 13:17:27 c7test.mydomain systemd[1]: Started LSB: Bring up/down networking. [root at c7test ~]# ip a 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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:1a:4a:16:01:00 brd ff:ff:ff:ff:ff:ff inet 10.4.4.33/24 brd 10.4.4.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::21a:4aff:fe16:100/64 scope link valid_lft forever preferred_lft forever [root at c7test ~]# HOIH, Gianluca