Using xattrs or Extended Attributes on Linux

Using xattrs or Extended Attributes on Linux Extended attributes, xattrs for short, are an extensible mechanism to store metadata along files. In other words, they describe some additional properties of the file. Normally this information is limited, like ownership and dates. With xattrs more information can be stored about the file. Support for xattrs Not all file systems have support for xattrs, but nowadays the most common ones support it (EXT4, Btrfs, ReiserFS, JFS and ZFS). To determine if your […]

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Securing mount points on Linux

Securing mount points Mount points are defined in /etc/fstab. They link a particular disk pointer to the related device (disk, partition or virtual device). By default the mount options are not focused on security, which gives us a room to further improve hardening of the system. This hardening is especially important considering our most precious data is stored here. Via mount options we can apply additional security controls to protect our data. Mount points Let’s have a look at our […]

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