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Church Of The
Swimming Elephant



Edlin: W (Write)--Notes

How the W command works

When you open a file, Edlin reads lines from disk until memory is more than 75-percent full. It reserves the other 25 percent for changes you might make to the text. If your entire file fits in memory, Edlin displays the following message:

End of input file

If you see this message, you do not need to use the w and a (append) commands.

If Edlin does not display this message when you open a file, the size of the file exceeds available memory. Therefore, you must edit your file in stages by using the w and a commands to write and read parts of the file, respectively.

The w command does not write to disk the changes you make unless it was actually necessary to use the w command. Therefore, if you use the w command even though the whole file fit into memory and then you use the q (quit) command to quit Edlin, none of the changes you made to the file are saved.

Line renumbering

After Edlin writes the first portion of the edited file from memory to a disk, you can use the Edlin l (list) command at the Edlin prompt to see the correctly renumbered lines that remain, beginning with line number 1.

Default setting

If you omit the n parameter, Edlin writes lines from the edited file in memory to a disk until memory is 25-percent full.

More Information About Edlin: W

ntcmds00000001.gif Edlin: W--Example

ntcmds00000001.gif Edlin: W


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