Why is running as root bad?
One of the key arguments to avoid running a container as root is to prevent privilege escalation. A root user inside a container can basically run every command as a root user on a traditional host system. When running an application on a Virtual Machine, you should also not run it as a root user.
Is root user necessary?
When to use root By default, it is not necessary to be root to be able to read most configuration files and documentation files in system directories, although it is necessary to be root to modify them. Root privileges are not needed by an ordinary user to compile and install software in its home directory.
Why sudo make install?
The system directories eg /usr , are reserved for the package management system to use. By definition, if you are doing make install that means you are making a local install, and if you need to do sudo make install that means you don’t have permission to wherever you are writing.
Why is it better to run specific commands using sudo instead of working permanently as root?
One security feature offered by sudo is that you can have a system without a root password, so that root user cannot login directly. This offers additional protection for users who pick weak passwords – the attacker trying to brute-force the password (via SSH or otherwise) will have to figure a valid username first.
How to build a root file in C?
The example $ROOTSYS/tutorials/tree/cernstaff.C calls a script to build the root file if it does not exist: ProcessLine takes a parameter, which is a pointer to an int or to a TInterpreter::EErrorCode to let you access the interpreter error code after an attempt to interpret.
Do you have to write Makefile for aclic root?
ACLiC will build a dictionary and a shared library from your C++ script, using the compiler and the compiler options that were used to compile the ROOT executable. You do not have to write a Makefile remembering the correct compiler options, and you do not have to exit ROOT.
How do I start root from the command line?
Please do not type in the example below at the ROOT command line, there is a much simpler way: Make sure you have the file slits.C on disk, and type root slits.C in the shell. This will start root and make it read the “macro” slits.C, i.e. all the lines in the file will be executed one after the other.
Where can I get the Pro version of root?
Just seek the “Pro” version on this webpage http://root.cern.ch/downloading-root. You will find precompiled versions for the different architectures, or the ROOT source code to compile yourself. Just pick up the flavour you need and follow the installation instructions.