Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 


Node:ed Scripts, Next:, Up:Scripts

ed Scripts

diff can produce commands that direct the ed text editor to change the first file into the second file. Long ago, this was the only output mode that was suitable for editing one file into another automatically; today, with patch, it is almost obsolete. Use the -e or --ed option to select this output format.

Like the normal format (see Normal), this output format does not show any context; unlike the normal format, it does not include the information necessary to apply the diff in reverse (to produce the first file if all you have is the second file and the diff).

If the file d contains the output of diff -e old new, then the command (cat d && echo w) | ed - old edits old to make it a copy of new. More generally, if d1, d2, ..., dN contain the outputs of diff -e old new1, diff -e new1 new2, ..., diff -e newN-1 newN, respectively, then the command (cat d1 d2 ... dN && echo w) | ed - old edits old to make it a copy of newN.


 
 
  Published under the terms of the GNU General Public License Design by Interspire