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Chapter 31. General Updates

The TAB key does not expand $PWD by default

When working in CLI in Red Hat Enterprise Linux 6, pressing the TAB key expanded $PWD/ to the current directory. In Red Hat Enterprise Linux 7, CLI does not have the same behavior. Users can achieve this behavior by putting the following lines into the $HOME/.bash_profile file:
if ((BASH_VERSINFO[0] >= 4)) && ((BASH_VERSINFO[1] >= 2)); then
    shopt -s direxpand

Upgrading from Red Hat Enterprise Linux 6 may fail on IBM Power Systems

Because of a bug in the yaboot boot loader, upgrading from Red Hat Enterprise Linux 6 to Red Hat Enterprise Linux 7 can fail on IBM Power Systems servers with an Unknown or corrupt filesystem error.
This problem is typically caused by a misplaced yaboot.conf configuration file. Make sure that this file exists, that it is valid, and that it is placed on a standard (non-LVM) /boot partition.

The /etc/os-release file contains outdated information after system upgrade

Upgrading to the next minor release (for example, from Red Hat Enterprise Linux 7.1 to 7.2) does not update the /etc/os-release file with the new product number. Instead, this file continues to list the previous release number, and a new file named os-release.rpmnew is placed in the /etc directory.
If you require the /etc/os-release file to be up-to-date, replace it with /etc/os-release.rpmnew.