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Bash: escape '-' character in filename

Extract tarball from internet without local saving
Use `tar xj` for bzip2 archives.

Replace all in last command

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Download mp3 files linked in a RSS podcast feed
Directly download all mp3 files of the desired podcast

list block devices
Shows all block devices in a tree with descruptions of what they are.

Create a tar archive with all files of a certain type found in present dir and subdirs
Note: the tar archive must not exist in order to create it. If exists it will only be updated and no already existent files in present search will still remain in the tar archive. The update option has to be used instead of create because the command tar may be executed more than once depending on the number of arguments that find throws. You can see maximum number of arguments with 'getconf ARG_MAX'

Watch active calls on an Asterisk PBX
Works on asterisk 1.8.

Check the package is installed or not. There will show the package name which is installed.
The ^python$ is a package name patten. You can change whatever you want.

check open ports without netstat or lsof


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