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Why I am getting "No such file or directory" error when I am running 32 bit executable in a 64 bit Ubundu installation?
What I expect is : A message that "file is invalid", OR the 32 bit code get run correctly.
Details below:
user@user-desktop:~/32_64$ ls
myfile32bit myfile64bit
user@user-desktop:~/32_64$ file myfile32bit
myfile32bit: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, not stripped
user@user-desktop:~/32_64$ file myfile64bit
myfile64bit: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, not stripped
user@user-desktop:~/32_64$ ls -l
total 1532
-rwxrwxrwx 1 user user 126381 2011-10-11 13:20 myfile32bit
-rwxrwxrwx 1 user user 146785 2011-10-22 12:46 myfile64bit
user@user-desktop:~/32_64$ ./myfile64bit
Hello World
user@user-desktop:~/32_64$ ./myfile32bit
-bash: ./myfile32bit: No such file or directory
user@user-desktop:~/32_64$ uname -a
Linux user-desktop 2.6.32-33-generic #70-Ubuntu SMP Thu Jul 7 21:13:52 UTC 2011 x86_64 GNU/Linux
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To install 32-bit libraries on Ubuntu 13.04 (64-bit) or later, open Terminal and type: sudo apt-get install lib32z1 (you will need to enter your password). Then just for good measure, let's make sure your Ubuntu is up to date. Type sudo apt-get update and lastly, restart your computer.
No such file or directory" means that either the executable binary itself or one of the libraries it needs does not exist. Libraries can also need other libraries themselves. then the problem can be fixed by making sure the mentioned libraries are installed and in the library search path.
All 64-bit (x86-64) CPUs should be fast enough to run Ubuntu and can run the 32-bit (x86) version as well.
However, with Ubuntu 20.04 there is no support for 32-bit at all. You can read more about the OS and download a Beta image HERE.
There is a great article about this exact problem here:
http://www.markusbe.com/2009/09/about-running-32-bit-programs-on-64-bit-ubuntu-and-shared-libraries/
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