Re: su command failing on RHEL5

[Bob Proulx]

Sanjay Kumar wrote:
> address@hidden ~]# su poo -c "cat /dev/tty"
> cat: /dev/tty: No such device or address
> ...
> strace is showing below:
> open("/dev/tty", O_RDONLY)              = -1 ENXIO (No such device or address)

The su command appears to be working properly.  The problem shown
above is that your system is missing the /dev/tty device node.
Something has apparently removed it!  You can confirm this by running
the following.

  ls -ld /dev/tty

You could repair your system by creating that device node.  See the
'mknod' documentation for how.

Bob