Ethan Banks
@ecbanks
Let’s say you want to see the requests Apache is upset about. How do you filter the logs to see every entry that doesn’t have a status code in the 200s? Depending on your Apache LogFormat, you could try…
sudo grep -E ‘\” [1345][01235][0-9] [[:digit:]]{1,8} \”‘ /var/log/apache2/access.log
If ‘apt update’ on Ubuntu 18.04 throws an error N: Skipping acquire of configured file ‘nginx/binary-i386/Packages’ as repository ‘http://nginx.org/packages/ubuntu bionic InRelease’ doesn’t support architecture ‘i386’, then replace the one line of text in /etc/apt/sources.list.d/nginx.list with this line instead.
deb [arch=amd64] http://nginx.org/packages/mainline/ubuntu/ bionic nginx
Writing and calling functions is a key component of the Don’t Repeat Yourself (DRY) principle of software development. Creating a function in a single script and calling that function from other scripts is preferable to performing copypasta of the same bit of code throughout several scripts. When a function lives in a single script, it only needs to be updated in that one place when it inevitably needs updating.
If you wanted to drop traffic at your Linux host destined for, let’s say, IPv6 netblock 2a09:8700:1::/48, you could get that done with this command.
sudo ip -6 route add blackhole 2a09:8700:1::/48
An ‘r’ before a string tells the Python interpreter to treat backslashes as a literal (raw) character. Normally, Python uses backslashes as escape characters.
PyCharm allows for the passing of environment variables from the IDE to a script, whether that script is running locally or in a remote SSH deployment you’ve configured for your project. To set the environment variables, select Edit Configurations from the Run menu.
Why does adding a query parameter on the end of a curl request against an API endpoint result in an error? Because you need -G and -d, that’s why.
Most of the search engine hits for “upgrade PHP on WordPress” told me to go into CPanel or a similar tool my hosting provider might offer to abstract what’s going on with the server itself. That’s not what I was looking for, because I manage my own hosts. I needed to know how to reconfigure the host itself. The OS packages to install. The conf files to tweak. The processes to restart. This was not obvious, as the magical CLI incantations required to complete the task varied depending on which Linux distro and HTTP server I was running on a given box.
