To download the package, look for the corresponding version to download
wget http://vault.centos.org/5.11/os/x86_64/CentOS/pdksh-5.2.14-37.el5_8.1.x86_64.rpm
install error
[root@localhost home]# rpm -ivh pdksh-5.2.14-37.el5_8.1.x86_64.rpm
warning: pdksh-5.2.14-37.el5_8.1.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID e8562897: NOKEY
error: Failed dependencies:
pdksh conflicts with ksh-20120801-35.el6_9.x86_64
uninstall
[root@localhost home]# rpm -e ksh-20120801-35.el6_9.x86_64
reinstall sucessfully
[root@localhost home]# rpm -ivh pdksh-5.2.14-37.el5_8.1.x86_64.rpm
warning: pdksh-5.2.14-37.el5_8.1.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID e8562897: NOKEY
Preparing… ########################################### [100%]
1:pdksh ########################################### [100%]