Difference between revisions of "Linux commands"
From Organic Design wiki
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sudo dhclient | sudo dhclient | ||
</bash>}} | </bash>}} | ||
+ | |||
+ | ==Devices== | ||
+ | ===fstab=== | ||
+ | Static information about the filesystems | ||
+ | |||
+ | {{code|<bash> | ||
+ | cat /cat/fstab | ||
+ | </bash>}} | ||
+ | ==mount== | ||
+ | All files accessible in a Unix system are arranged in one big tree, | ||
+ | the file hierarchy, rooted at /. These files can be spread out | ||
+ | over several devices. The mount command serves to attach the file | ||
+ | system found on some device to the big file tree. |
Revision as of 08:20, 8 June 2008
I'm starting a list of useful linux shell commands (generally "one liners") we use a lot
Contents
Image Manipulation
Resizing JPG's and changing quality setting
The first line shows how to reduce and image to 25% and quality to 50% adding "_resized" to the results filename. The second command uses Perl to apply this same command to all JPG's in the current directory.
Apply an opaque background of a specified colour to a directory of transparent PNG's
- This command requires ImageMagick to be installed
- It loops through all PNG's in the CWD and puts them in a directory called processed which must exist
See also
- Converting_microarray_images for bash/imagemagick image file manipulation
Network commands
Release DHCP lease
Obtain a new DHCP lease
Devices
fstab
Static information about the filesystems
mount
All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree.