Going from UNIX TRU64 to REDHAT 5.3 1

[ejaggers]

Need Help With A Few Linux Commands:

T64:
more xxx - clears the screen and displays file xxx, but does not return to the command line until I enter space or CR.

RH:
How do I get more on Linux to wait on me? If xxx is less than a screen, more displays and returns to cmd prompt w/o waiting. I'm using system(more xxx) in Perl but not seeing the display.

T64:
logon as xyz and su
echo $USER I get root

RH:
logon as xyz and su
echo $USER I get xyz, unless I su -
I use $ENV{USER} in Perl scripts and I'm not getting root.

 

[Annihilannic]

You could use less instead of more, which always displays an END prompt, but may be confusing for users because it requires a "q" to quit. In which case you prefer the less -e behaviour.

The whoami command may be a more portable way to do that, however in PERL you should probably use the built-in function getlogin().



Annihilannic.

 

[ejaggers]

Annihilannic, Thanks for the tip on less. Howerever, about the problem with REDHAT not knowing the user.
I login as xzy and then su (not su -) to root, getlogin() in the perl script prints xyz (RH & Unix). But whoami does work on both.

 

[Annihilannic]

Sorry, I must have screwed up my testing.

Try this too:

use POSIX;
print getpwuid(geteuid()) . "\n";

Note that getpwuid() returns a list of values, here I'm just using the first one in scalar context.

Annihilannic.