File-manipulation.

@cp

 : Type @cp xxx yyy to copy the data-files b.xxx, s.xxx, d.xxx, c.xxx to b.yyy, s.yyy, d.yyy, c.yyy, respectively.

@mv

 : Type @mv xxx yyy to move the data-files b.xxx, s.xxx, d.xxx, c.xxx, to b.yyy, s.yyy, d.yyy, c.yyy, respectively.

@df

 : Type @df to delete the output-files fort.7, fort.8, fort.9.

@cl

 : Type @cl to clean the current directory. This command will delete all files of the form fort.*, *.o, and *.exe.

@dl

 : Type @dl xxx to delete the data-files b.xxx, s.xxx, d.xxx.