oreilly.comSafari Books Online.Conferences.


Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

Buy it now, or read it online on Safari Bookshelf.


losetup [options] loopdevice [file]

System administration command. Set up and control loop devices. Attach a loop device to a regular file or block device, detach a loop device, or query a loop device. A loop device can be used to mount an image file as if it were a normal device.



Detach specified loopdevice.

-e encryption, -Enumber

Use specified kernel encryption module when performing writes and reads. (Usually NONE, DES, and XOR.) You may also specify the encryption module by number. When using DES encryption, you will be prompted for an initialization passphrase.

-o offset

Start reading data at offset bytes from the beginning of file.

-p fd

Read the passphrase from file descriptor fd.

Linux Resources
  • Linux Online
  • The Linux FAQ
  • Linux Kernel Archives
  • Kernel Traffic

  • Sponsored by: