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At the beginning I tried to fix the problem of /lib/ld-linux-so.3:No such file or directory when I tried to run some dynamically cross-compiled binaries. So I added some shared binaries to /lib. I changed or deleted some important files in /lib. I know it seems silly.

Now the problem is whenever I want to run an executable binary I get this error:

Error while loading shared open shared object file: No such file or directory.

I have copied to /lib from somewhere else. Would anyone give some suggestion to fix /lib? Something to update or install it again? Thanks.

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Try booting ubuntu from external media (CD,USB), then mount your root partition in /mnt/root for example. After that try reinstalling the libgcc1 package, the command should be something like:

apt-get --root-directory=/mnt/root install libgcc1

This should fix the libgcc problem, but perhaps you will have other problems with other libraries. Repeat this until you have usable apt-get in your real linux, where you can reinstall the other broken libs.

Hint: if you have your linux working or have another ubuntu linux, you may find the package name for each file you need by running:

apt-file search /lib/

Hint2: You may find useful the chroot, once you reinstall the missing libraries, you can

chroot /mnt/root /bin/sh

this way you will be able to see if your linux is working correctly without rebooting to your linux and back to external media in case it's not working.

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