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Andrew Cholakian's questions

Martin Hope
Andrew Cholakian
Asked: 2009-12-17 18:31:28 +0800 CST
  • 0

Our main office currently runs on an unreliable pair of bonded T1s in a somewhat remote area. Our lines have issues about 3 - 4 times a year (esp. after rain) which no one seems to be able to fix. Our only other option in our area is WiMAX.

What do I need to know about WiMAX in deciding whether to switch over? The last thing I'd want to do is switch to something even less reliable than our current setup. We're in Southern California so the weather here is pretty decent, though our area is mountainous and can have thick fog. We're about 5-6 miles away from the wireless tower with line of sight. Our office regularly maxes out our 3 megabits and we'd like to upgrade our line to 6 if we do this since WiMAX brings some cost savings as well.

Also, I was told that full duplex wimax is more expensive than half for the same data rate. What do I need to know about this? I was told that a full duplex WiMAX setup has the same bandwidth and latency, which makes it sound like full duplex isn't any better. What am I missing?

The services we use our T1s for are: 1. Web Browsing 2. Hosting some low traffic services like SVN and some small HTTP sites for internal use. 3. Remote Access via RDP and SSH 4. Bulk uploads via SFTP / RSYNC 5. Skype (but only a little bit).

We don't need VOIP, POTS is fine for us.

networking
Martin Hope
Andrew Cholakian
Asked: 2009-05-22 09:07:33 +0800 CST
  • 10

This is a server running ubuntu 8.04 server, any idea what's going on?

# ls
-bash: /bin/ls: No such file or directory
# /bin/ls
-bash: /bin/ls: No such file or directory
# stat /bin/ls
  File: `/bin/ls'
  Size: 39696       Blocks: 80         IO Block: 4096   regular file
Device: 803h/2051d  Inode: 1073910881  Links: 1
Access: (0755/-rwxr-xr-x)  Uid: (  122/ UNKNOWN)   Gid: (  114/Debian-exim)
Access: 2008-06-05 15:07:22.491486000 -0700
Modify: 2008-04-03 23:44:23.000000000 -0700
Change: 2009-05-21 07:42:45.715736917 -0700
#:/bin# dd if=/bin/ls of=/dev/null 
77+1 records in
77+1 records out
39696 bytes (40 kB) copied, 0.000157908 s, 251 MB

I have no idea how it got the weird GID and UID, neither one exists in /etc/passwd

I recently performed the ubuntu NTP update to fix a security hole.

Update: I just noticed /bin/netstat has the same issue

Update: looks like I got rooted, ran rkhunter and it found a kit...

linux ubuntu
Martin Hope
Andrew Cholakian
Asked: 2009-05-20 09:10:52 +0800 CST
  • 1

I recently created a disk with a single xfs partition in ubuntu 9.04. I tried plugging it back in as a USB disk using an enclosure, and it shows up as /dev/sde. Unfortunately there is no /dev/sde1. cfdisk and other tools show that the partition is there, but the actual device file is not there, which means I cannot mount it.

What could cause this behavior, and how can I fix it? I tried running cfdisk, and re-writing the partition table, which just caused cfdisk to indefinitely hang.

linux partition