Final answer:
To move the 'common.txt' file to the 'others' directory in the 'unixintro' directory, the command 'mv common.txt unixintro/others/' should be used.
Step-by-step explanation:
To move the common.txt file to the others directory within the unixintro directory using Unix command, you should use the mv command. The full command would look something like this:
mv common.txt unixintro/others/
This command assumes that you are in the same directory as the common.txt file. If you are not in the same directory, you will have to specify the full path to common.txt.
The command that should be used to move the common.txt file to the others directory in the unixintro directory is:
mv common.txt unixintro/others/
This command uses the mv command followed by the name of the file (common.txt) and the destination directory (unixintro/others/).