durep was designed for monitoring disk usage in a more visual way than du. The du program works fine but doesn’t allow a lot of control over how the results are displayed. This perl script is designed to produce output more useful for reports. Although durep can produce text output similar to du, its real [...]

This program will output a PNG and a text file that can be used in scripts or be included in web pages to show current bandwidth usage. The amount of total bandwidth can be customized. The PNG output appears as a bar graph showing maximum possible usage with the current inbound or outbound usage shown [...]

Monitor network traffic or speed/progress of a file transfer. The program can be used for cases like: how long it will take for my 38MB transfer to finish, how quickly is another transfer going, How fast is the upstream on this ADSL line and how fast can I write data to my filesystem.
[ http://excess.org/speedometer/ ]
To [...]

size utility lists the section sizes–and the total size–for each of the object files objfile in its argument list. By default, one line of output is generated for each object file or each module in an archive.
Definations of each sentions:
Text segment: The machine instructions that the CPU executes. This is usually read [...]