My best educated guess is to perform a checklist on the following: Take a look at the virtual host configuration files for your domains, if you have access to them. Ensure that they agree with the corresponding WordPress installations on your machine(s). If your Virtual Host configurations are written correctly and as intended, then the … Read more
The short answer: Either one is what you are looking for, but my first choice would be memcache (the first one you listed), purely based on its correct use of nomenclature. Now here’s how I came to that conclusion: Here is a quick backgrounder in naming conventions (for those unfamiliar), which explains the frustration by … Read more
I’m not sure how you dump all the memory to a file without doing this repeatedly (if anyone knows an automated way to get gdb to do this please let me know), but the following works for any one batch of memory assuming you know the pid: $ cat /proc/[pid]/maps This will be in the … Read more
It looks to me like you’re trying to utilize jQuery in custom code, but haven’t actually enqueue’d the jQuery script – This line gives it away (I think?): ReferenceError: jQuery is not defined if you are using wp_enqueue_script to bring in a custom .js file, make sure you set jquery as a dependancy wp_enqueue_script( ‘my-script’, … Read more
One way would be with sed: mv ‘file’ $(echo ‘file’ | sed -e ‘s/[^A-Za-z0-9._-]/_/g’) Replace file with your filename, of course. This will replace anything that isn’t a letter, number, period, underscore, or dash with an underscore. You can add or remove characters to keep as you like, and/or change the replacement character to anything … Read more
The “cached” total will also include some other memory allocations, such as any tmpfs filesytems. To see this in effect try: mkdir t mount -t tmpfs none t dd if=/dev/zero of=t/zero.file bs=10240 count=10240 sync; echo 3 > /proc/sys/vm/drop_caches; free -m umount t sync; echo 3 > /proc/sys/vm/drop_caches; free -m and you will see the “cache” … Read more
There is no such thing as an “open” UDP port, at least not in the sense most people are used to think (which is answering something like “OK, I’ve accepted your connection”). UDP is session-less, so “a port” (read: the UDP protocol in the operating system IP stack) will never respond “success” on its own. … Read more
These limits came from a time where multiple “normal” users (not apps) would share the server, and we needed ways to protect them from using too many resources. They are very low for high performance servers and we generally set them to a very high number. (24k or so) If you need higher numbers, you … Read more
One of your login scripts (.bashrc/.cshrc/etc.) is probably outputting data to the terminal (when it shouldn’t be). This is causing ssh to error when it is connecting and getting ready to copy as it starts receiving extra data it doesn’t expect. Remove output that is generated in the startup scripts. You can check if your … Read more
I was in a similar situation; fully managed dedicated server, LAMP, CentOS. Then we decided to move to EC2. Also, I had very little systems or linux administration experience. I have almost zero experience with Ubuntu, so I really cannot speak to which is the so-called better OS. I tried a bunch of pre-built AMI’s … Read more