Let's see how to display yesterday's date with the date command.
On MacOS, we pass the following command:
date -v -1d +'%Y-%m-%d'
On Linux:
date -d 'yesterday' +'%Y-%m-%d'
date -v -1d +'%Y-%m-%d'
date -d 'yesterday' +'%Y-%m-%d'
Not sure who will use it, but I encountered it myself, because my home is a floating IP. A software I installed cannot detect that the ppp0 network card is an external network, so changing the name can trick him into successfully installing it.
Detect whether selinux is enabled in the system
rsnapshot is a rsync-based tool that can perform snapshot incremental backups. However, we installed which rsnapshot in CentOS. Why is there no such command? There is no way to install it with yum install rsnapshot?
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