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--- vlsi:computing_remote [22/06/2013 18:42]
pacher
+++ vlsi:computing_remote [30/07/2013 21:23]
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@@ Linea 563: / Linea 563: @@
 **Tunnelling**
+Double-hop ssh tunnel (ssh on one machine, then on another)
+Situation: A and B are remote hosts. Local machine can SSH into A, but not B. B ONLY accepts SSH connections from A.
+one SSH from local to A that tunnels from a secondary local port (like 2121) to port 21 on B, and then you can SSH to localhost:2121 and login on B
 Un modo ad esempio e':
@@ Linea 642: / Linea 648: @@
 </code>
-move the ''id.rsa.pub'' as ''~/.ssh/authorized_keys
+move the ''id.rsa.pub'' as ''~/.ssh/authorized_keys''
 <code>
@@ Linea 655: / Linea 661: @@
 [[http://www.thegeekstuff.com/2008/06/perform-ssh-and-scp-without-entering-password-on-openssh/]]
+\\
+\\
+**Viewing images from the command line**
+If you need to view any image but you can only use the terminal,
+use the //Eye of GNOME// image viewer, which is the official image viewer
+for the GNOME Desktop environment and available on all Scientific Linux dictributions.
+Use the ''eog'' command,
+<code>
+which eog
+/usr/bin/eog
+</code>
+To open an image,
+<code>
+cd /path/to/image
+eog fileName.png
+</code>
+See also \\
+[[http://projects.gnome.org/eog/]]