Yes this is very common practice in unix. In fact on mac os x the saying "less is more" is in fact literally true, because both the command "less" and the command "more" are the same program.

ls -i /usr/bin/more /usr/bin/less
2555402 /usr/bin/less 2555402 /usr/bin/more

(this shows they have the same inode number and are thus both hard links to the same thing)

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