Hi,
I want to set up Solaris studio in Red hat. Here is what I see within /tmp

[root@localhost tmp]# ls -l *.*
-rw-r--r-- 1 root root 5 Apr 2 16:59 scim-bridge-0.3.0.lockfile-0@localhost:0.0
srwxr-xr-x 1 root root 0 Apr 2 15:59 scim-bridge-0.3.0.socket-0@localhost:0.0
-r-------- 1 root root 436944436 Mar 30 15:40 SolarisStudio12.3-linux-x86-rpm.tar.bz2

SolarisStudio12.3-linux-x86-rpm:
total 425484
drwxr-xr-x 2 root root 4096 Mar 30 15:44 LEGAL
-r--r--r-- 1 59001 wheel 7223 Dec 6 05:19 OSS12.3_README-pkgs-ja.html
-r--r--r-- 1 59001 wheel 5174 Dec 6 01:56 OSS12.3_README-pkgs.txt
-r--r--r-- 1 59001 wheel 5324 Dec 6 05:19 OSS12.3_README-pkgs-zh_CN.html
-rwxr-xr-x 1 59001 wheel 435216384 Dec 6 01:49 solarisstudio.sh

virtual-root.9n3hS2:
total 0

virtual-root.bycZHy:
total 0

why can’t I do this?
[root@localhost tmp]# su
[root@localhost tmp]# ./solarisstudio.sh
bash: ./solarisstudio.sh: No such file or directory
[root@localhost tmp]#

Many thanks

why? because from what you've shown, that script file is NOT in that directory. In the first ls, you have a tar.bz2 file, but then on the next line it's an RPM? What's that about? Have you decompressed this package, whatever it is?