MacOS
If you try to mount an ISO file (like a Linux distribution) on MacOS and you get that weird error saying "No mountable file systems": Then, you can easily find a workaround by using CLI. % mkdir /mnt/iso % hdiutil attach -nomount FILENAME.iso /dev/disk2 FDisk_partition_scheme
MacOS
Mac OS X is automatically creating .DS_Store file as soon as you're working on some network drives. This is used to store some custom attributes. If you want to prevent the OS to create those files automatically, follow the steps below: * Open up a Terminal * Run this
Linux
When analyzing the output of a bash script, it can be useful to prepend timestamp before each line to see how long it's taking to do a specific action. For this, you can use the 'ts' command: # echo -e "this\nis\na\ntest" | ts
Linux
Seeing that error in HTTPd/Apache logs when trying to GET some pages? (13)Permission denied: [client xxxxx]: access to /html/myfile.html denied because search permissions are missing on a component of the path This is because of some SELinux policies blocking the calls. If you don't
Linux
When updating or installing a package on a Debian-based distribution, you can face that alert: W: GPG error: http://ppa.launchpad.net trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2518248EEA14886 This just means that a signing GPG
Linux
The PKCS12 format is replacing the old PFX format from Microsoft. This format will allow storage of X.509 private keys and the associated public certificates in a single encrypted file. So you can extract the key and the certificate in a single common PEM file, you can use this
Linux
When doing update on a Debian/Ubuntu server, if a package is trying to modify a config file, it's asking for a manual choice. If you're trying to try to automate the process, you'd probably like to get rid of that ask and keep
Linux
There is no way to easily automate deployment of Oracle JRE since there is no official repository for most of the linux distros. But there's still a workaround to automatically download the JRE and install it locally on a server by using command lines. Here is an example
Linux
Forgot your SSH key passphrase? There's an easy way to renew it locally if you have access to it: ssh-keygen -p -f ~/.ssh/id_rsa And then, enter the new passphrase you want to use.
Linux
If you want to execute some special commands, log or make an API call when you're receiving an email onto your server, you can easily set up this by using procmail. Procmail is designed to filter and sort emails but can make any call you want. Here, as
Linux
How to execute a cron on a specific day of the week once in the month? This could look simple as we could think that this line in cron would do the trick: # Run on every second Tuesday of the month 15 3 8-14 * 2 /usr/bin/bash /opt/
Linux
On Linux, there's many ways to control services that can run on your system. Here are the main and most known init systems that you can find on the common distros, depending on their version. SystemV That system is one of the oldest and one of the most