On Sat 24 Nov 2018 at 21:33:18 (-0500), Gary Dale wrote: > On 2018-11-24 9:05 p.m., David Wright wrote: > > So you can see the extra work (worth more than two cents) that > > the higher level commands do for you automatically, thanks to > > /etc/network/if-*.d/* > > That, of course, assumes that ifup and ifdown work on your system. > They don't work on two of my systems that uses systemd-networkd to > control the network.
I don't understand why you would *want* to use ifup/ifdown on a system where you've chosen to control the interface with systemd-networkd. The only reason I bothered to actually perform the worked example was because I have one host that's still using what the installer left as its default. > However ifconfig works on one and ip works on the > other (although they are both running Stretch, one is a new > server-type install while the other has been upgraded over the years > from earlier versions). Perhaps it would be useful to discover why, and then post any helpful hints on what to do or avoid if other shave such a problem. > The lower-level tools tend to be more flexible and are more agnostic > regarding how your network is set up. Yes, one might suppose that the high-level tools use the low-level ones in a pre-arranged (hence less flexible) manner to do the actual work. > In the case of the OP, he needs to change his interfaces file no > matter how he changes the network. However the order of commands isn't > important when he uses ifconfig or ip to update the ip address - he > can do it before or after editing interfaces. Moreover, it takes one > fewer command. And it's worth learning how to use these tools if you > are working with networks. I don't understand why you'd recommend using a particular method when you've just explained that you can't get it to run consistently on your own systems. Nor do I understand why the number of commands required is of such importance: isn't that what scripts are for. One reply suggested installing network manager just to reduce the command count to two. That's a 15 package installation on my system. Cheers, David.
