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Stuck behind a restrictive firewall at work, but really jonesing to putty home to your linux box for some colossal cave? Goodness knows I was...but the firewall at work blocked all outbound connections except for ports 80 and 443. (Those were wide open for outbound connections.) So now I putty over port 443 and have my linux box redirect it to port 22 (the SSH port) before it routes it internally. So, my specific command would be:
$iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 22
Note that I use -A to append this command to the end of the chain. You could replace that with -I to insert it at the beginning (or at a specific rulenum).
My linux box is running slackware, with a kernel from circa 2001. Hopefully the mechanics of iptables haven't changed since then. The command is untested under any other distros or less outdated kernels.
Of course, the command should be easy enough to adapt to whatever service on your linux box you're trying to reach by changing the numbers (and possibly changing tcp to udp, or whatever). Between putty and psftp, however, I'm good to go for hours of time-killing.
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!
The title is optional.
Options:
-t: expire time in milliseconds.
-u: urgency (low, normal, critical).
-i: icon path.
On Debian-based systems you may need to install the 'libnotify-bin' package.
Useful to advise when a wget download or a simulation ends. Example:
$ wget URL ; notify-send "Done"
This appends (-A) a new rule to the INPUT chain, which specifies to drop all packets from a source (-s) IP address.
Play files in shuffle mode with bash and mpg123.
Why bother using big-as-hell stuff like mplayer? This will play all your music files contained in */* (in my case author/song.format) with bash and mplayer showing a nice output.
no need grep. its redundant when awk is present.
Creates a quick backup with tar to a remote host over ssh.