BASH can deal with simple functions, and they are defined like this: # this defines the function function testing { echo “Hi there!” } # this calls our function testing As far as I know, BASH functions cannot take or return parameters.
Here’s how to use simple variables in BASH shell scripts. It appears there are no data types, and everything’s a string (correct me if I’m wrong). We can define a variable by first setting it to a value, then later refer to that value with a dollar sign in front of the variable name. Here’s … Read more
I have recently installed PHP 7 from source on a fresh minimal CentOS 7 box. No previous version of PHP was installed, and I thought I’d give 7 a spin. There were a few pitfalls I hadn’t come across before, so here’s what worked for me. Downloading and extracting the source code It sounds crazy, … Read more
I was working on a CentOS 7 server the other day that had a LAMP stack installed. It was used to host only a single instance of WordPress. Upgrading themes and plugins from the admin interface worked fine, but curiously, WordPress core upgrades did not. Instead, WordPress was asking for FTP details every time, which also … Read more
CentOS 6 comes with Python 2.6 installed, and CentOS 7 comes with Python 2.7. But right now, Python 3.5 is all the rage, so I thought I’d install it alongside Python 2.x on the same machine.
Here’s how I did it.
I’m using a CentOS 6 32 bit system here, but I’ve tried the same on a CentOS 7 64 bit rig. You need to be root or have superuser privileges to do this successfully.
I’ve recently come across a tarsal files that used xz compression (namely the Python source code). This means that my usual way of extracting a tarsal via the command line using the following command did not work: tar -zxvf Python* gzip: stdin: not in gzip format tar: Child returned status 1 tar: Error is not … Read more
In CentOS 7 we can use the systemctl command to select which mode the OS boots into. If you have a GUI like Gnome or KDE installed, it’s easy to boot directly into your preferred environment. To find out what mode CentOS is currently using, use this: systemctl get-default This will give you one of … Read more
I’ve come across an odd problem today on a server that’s been working fine for all kinds of FTP traffic for many years. Turns out that today, FileZilla started complaining about explicit TLS connections (when available) and gave the following error message: 425 MLSD unable to build data connection: operation not permitted Clients could still … Read more
