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Alternative if "Lazy unmount" (umount -l) doesn't obey.
Alternative for NFS:
$ umount -f /media/sdb1
Use with caution: forcing to unmount a busy partition can cause data loss!
This is a kind of wrapper around the shell builtin cd that allows a person to quickly go up several directories.
Instead of typing:
cd ../..
A user can type:
cd ...
Instead of:
cd ../../..
Type:
cd ....
Add another period and it goes up four levels. Adding more periods will take you up more levels.
% acts on every line in the file.
\s matches spaces.
\+ matches one or more occurrences of what's right behind it.
Character '$' matches end-of-line.
This could be used to filter commands that might be from trolls
Long before tabbed terminals existed, people have been using Gnu screen to open many shells in a single text terminal. Combined with ssh, it gives you the ability to have many open shells with a single remote connection using the above options. If you detach with "Ctrl-a d" or if the ssh session is accidentally terminated, all processes running in your remote shells remain undisturbed, ready for you to reconnect. Other useful screen commands are "Ctrl-a c" (open new shell) and "Ctrl-a a" (alternate between shells). Read this quick reference for more screen commands: http://aperiodic.net/screen/quick_reference
This will download all files of the type specified after "-A" from a website. Here is a breakdown of the options:
-r turns on recursion and downloads all links on page
-l1 goes only one level of links into the page(this is really important when using -r)
-H spans domains meaning it will download links to sites that don't have the same domain
-nd means put all the downloads in the current directory instead of making all the directories in the path
-A mp3 filters to only download links that are mp3s(this can be a comma separated list of different file formats to search for multiple types)
-e robots=off just means to ignore the robots.txt file which stops programs like wget from crashing the site... sorry http://example/url lol..