Generally no. There are some parts of your system that you will have to reboot for (like the kernel). But apps? Installing a new service?
No.
Most systems you just install the app you want, and run it.
There are some immutable distros the require things that are installed as part of the base system to only be available after a reboot, but they provide ways to install things without making it a part of the base system. Thus no reboot required.
I’ve run into probably half a dozen applications that request a reboot before installation, even if you just rebooted and the launcher was the first thing you ran.
Usually older and very niche software. Business shit from the AS400 era, medical applications (including modern), not generally your standard stuff most people are installing.
Is what necessary?
Reboot to install software?
Generally no. There are some parts of your system that you will have to reboot for (like the kernel). But apps? Installing a new service?
No.
Most systems you just install the app you want, and run it.
There are some immutable distros the require things that are installed as part of the base system to only be available after a reboot, but they provide ways to install things without making it a part of the base system. Thus no reboot required.
In some cases, yes.
I’ve run into probably half a dozen applications that request a reboot before installation, even if you just rebooted and the launcher was the first thing you ran.
Usually older and very niche software. Business shit from the AS400 era, medical applications (including modern), not generally your standard stuff most people are installing.