The Bash command environment, which is the namesake of this blog, is very flexible in that it allows you to manipulate the filesystem in many ways. Awk and sed are very powerful tools that allow you to do this rename with a simple one line command. This post will walk you through doing this with [...]
Categories: Code Samples, Linux, Shell, System Administration
It is very easy to create a random file using the linux command line. Much like the command to fill a file with all zeros, for example a 1 Meg file:
dd if=/dev/zero of=zero.filename bs=1024 count=1000
You do the same using /dev/urandom:
dd if=/dev/urandom of=random.filename bs=1024 count=1000
Resulting in a 1MB file:
1000+0 records in
1000+0 records out
1024000 bytes (1.0 MB) [...]
Categories: Code Samples, Linux, Security, Shell
Tagged: command line, Linux, tips
We recently did some speed testing on a few of the servers on our network, and we were not receiving the speeds expected considering they were sitting on a physical 100mbps ethernet port. The servers were indeed on physical 100mbps connection, however wget (TCP/IP, HTTP Port 80) download tests showed only a max of about 1.5MB/sec (note the 8bit/byte conversion, so this translates to about 12mbits).
Categories: Linux, Software, System Administration, Ubuntu
You’ve flashed your old WRT54G or other vanilla router with the Tomato firmware. This itself turns your router into a lean, mean routing machine with QOS, SSH and more, but let’s say we want to take it a bit further. What it we want to get some more stats out of it?
In order to do [...]
Categories: Code Samples, Configurations, Hardware, Linux, Other Code, Programs, Shell, Software, System Administration, Tech
Have you ever come across a server that is doing a lot of traffic? Maybe you have logged in to see a process running at 100% CPU, so you know the culprit, but instead of kill -9ing it, wouldn’t it be great to see what exactly it is up to? Or even if you see [...]
Categories: CentOS, Code Samples, Linux, Shell, System Administration
Tagged: command line, Linux, network, Security, system admin, traffic
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