PPPL Unix Cluster
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The original way in which most aspect of Unix was documented was via ``man'' pages. Traditionally these were bound into ``sections'', with section 1 containing user commands, section 2 containing system calls, section 3 containing library routines, etc. A man page designation ls(1) then documents the command ``ls'' in section 1.
The simplest way of reading a man page is via the command man(1).Getting Help Getting Help info