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Posted on in Networking
If you've worked on networks long enough, you're probably familiar with
iperf. This application is great for testing
throughput between two computers on your network. Unfortunately, if you find
yourself in a situation where you have less than two computers to test with,
iperf is less than ideal.
Fortunately, Cisco …
Posted on in Programming
This is one of those annoying little things I have to do ever so often. There are two different commands to accomplish this task depending on the specific situation.
If you've made a lot of changes to a file and need to back all of those changes out, you can …
Posted on in IT Management
I got a call from GoDaddy the other day warning me that VeriSign is raising the price of domain registrations. This seems like a big deal because the price hike is happening on July 1st. The truth, though, is that VeriSign announced the price increase six months ago in December …
Posted on in System Administration
If you have SSH open toward the Internet, you are surely aware of the number of brute force password attempts your server sees everyday. Although a good password policy may make these attempts nothing more than an annoyance, each connection to your SSH daemon takes up valuable server resources. I …
Posted on in System Administration
If you've ever seen this, you've felt my pain:
# mount -vv -t nfs4 slap:/export/a/b/c /mnt
mount: pinging: prog 100003 vers 4 prot tcp port 2049
mount.nfs4: slap:/export/a/b/c failed, reason given by server: No such file or directory
My original thought was …
Posted on in System Administration
If a Mac has the wrong time zone, scheduled jobs, log timestamps, calendar notifications, and incident timelines become harder to trust. The fix is simple, but it is worth separating the time zone from the clock itself: setting the zone changes how local time is displayed; it does not fix …
Posted on in System Administration
I recently needed to archive a bunch of old home directories on a CIFS share mounted on my Windows XP virtual machine. I wanted each home directory to be archived independently so that I would have lots of smaller zip files rather than one huge one. Additionally, maintaining the directory …
Posted on in System Administration
Network Appliance (NetApp) advanced single-instance storage (A-SIS) deduplication is a free technology that ships with every NetApp filer. The technology works at the block level to efficiently compress volumes so that you can get more data in a limited space. All the deduplication setup and maintenance operations are controlled with …
Posted on in Software
Before version 1.8, Google Apps Sync for Microsoft Outlook did not support automatic updating of your domain's Global Address List (GAL). Domain administrators were forced to creating a static copy of the GAL and make that available to Outlook via a change in the desktop's registry. With the latest …
Posted on in Information Systems
As expected, it was only a matter of time before the Rural Utilities Service (RUS) made its list of Round 2 BIP applications available online rather than in the previously released PDF format. The new online database coincides with the posting of Public Notice Filings. You can browse the Round …
Posted on in System Administration
One of the suggestions for improving the performance of your website is to properly set the Expire and Cache-Control headers of the HTTP response for images. Since images rarely change, the Expire time should be set far in the future. This ensures that web browsers will attempt to retrieve the …
Posted on in Voice / Telephony
Records a legacy URL-based firmware upgrade method for Linksys and Cisco small-business ATAs.
Posted on in uncategorized
Sometimes your wonderful Amazon Kindle may get hung and need a little help. How to go about issuing a hard or soft reset depends on which version of the Kindle you have.
Soft Reset: Hold down Alt-Shift-R
Hard Reset: Remove the back cover and insert a paperclip …
Posted on in System Administration
The default username and password for all versions of Cisco Access Registrar (as of version 5.0):
Username: admin
Password: aicuser
Perhaps this will save you a little time someday.
Posted on in System Administration
Note: This post is a natural continuation of my post Command Logging is Vital to System Administration.
The primary purpose of sudo is to allow system administrators to execute
commands as the superuser (AKA root). It allows a group of people to manage a
system without the hassle of keeping …
