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Attention of systems

The Linux OS initially has some software installed. But if you reinstall the software that was already installed, it will not run well. This phenomenon is called conflict. Conflict is the most frequently occurring error condition in Linux. If that software still does not run, one must check the setting of the environmental variable, which is very important to run different software simultaneously. The .bashprofile on the home directory must be rewritten for setting of the environmental variable.