Does checkrestart (apt-get install checkrestart) prompt for application restarts on library updates, or only for daemons?
On Jan 29, 2018 08:43, "Joe" <j...@jretrading.com> wrote: > On Mon, 29 Jan 2018 08:18:35 -0500 > rhkra...@gmail.com wrote: > > > > > > I regularly download "security" upgrades for Wheezy. I assume that > > most of those don't take effect until I restart the application. For > > instance, a Firefox upgrade does not take effect until I shutdown > > Firefox and restart it. > > > > Correspondingly, I assume that a Linux kernel upgrade does not take > > effect until I reboot the machine. > > Yes, but it's a little more complicated. The modules used by the kernel > (and the kernel file itself) *are* replaced during the process of > upgrading the kernel, but the running code is not. There is a tiny > chance of some kind of mismatch if new modules are loaded, so rebooting > is recommended soon, and in the past I used to see a message to that > effect, displayed during the upgrade. > > Generally, user applications (e.g. Firefox) will not be restarted > automatically, but most daemons will be e.g. mysql, exim4. Some > important daemons may request your input as to whether to restart or > not e.g. during a major upheaval such as a libc upgrade. Pretty much > all software on a server is in the form of daemons, and generally > rebooting a server is only necessary after a change of kernel. > > -- > Joe > >