4.25. pdksh

The Public Domain Korn SHell implements the ksh-88 programming language for both interactive and shell script use.

pdksh — a new package in Red Hat Enterprise Linux 5.4 — does not recognize the keyword source in scripts. However, the /etc/profile.d/kde.sh script uses the source keyword in the line source /etc/sysconfig/prelink. Consequently, if a user is using pdksh as their shell, and KDE is installed, the following error message will be returned in login shells:
```
ksh: /etc/profile.d/kde.sh[7]: source: not found
```
To work around this issue, change the
```
source /etc/sysconfig/prelink
```
line in the /etc/profile.d/kde.sh script to
```
. /etc/sysconfig/prelink
```
The keyword . is an alias for source in all Bourne compatible shells including bash, AT&T ksh, and pdksh.
This issue will be resolved in an upcoming update to Red Hat Enterprise Linux 5.4. (BZ#510374)

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