On my shared hosting where I had few websties, I've created trypython where I executed commands on the server (using CGI) and I thought that I've secured the thing even that someone on StackOverflow said that it's not possible to sandbox standalone python. You couldn't directly import modules that execute shell commands or other modules that import it. I thought it was ok until someone wipe out whole disk for my account.
On my old old laptop I had Linux installed and I was running out of disk space on my root partition, the /home/ partition still have room so I moved /tmp directory to /home and created symlink in place of original directory. It was working fine but then I needed more space, so I moved /usr directory and while moving my whole installation was broken because commands could not find shared libraries /usr/lib, I was only able to use apps that where already running. I had broken CD and it was not possible to boot from USB and didn't have external drive to backup my data. I thought that machine was broken because it had non-SATA DVD drive and you could only buy new Sata DVD. Fortunately I had firefox running with fireFTP and connected, via WiFI, with ftp to my mother laptop, where I installed ftp server and backup all the data. Few years later I bought used DVD Drive that was working with that laptop and give it to my mother.
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I have two stories:
On my shared hosting where I had few websties, I've created trypython where I executed commands on the server (using CGI) and I thought that I've secured the thing even that someone on StackOverflow said that it's not possible to sandbox standalone python. You couldn't directly import modules that execute shell commands or other modules that import it. I thought it was ok until someone wipe out whole disk for my account.
On my old old laptop I had Linux installed and I was running out of disk space on my root partition, the /home/ partition still have room so I moved /tmp directory to /home and created symlink in place of original directory. It was working fine but then I needed more space, so I moved /usr directory and while moving my whole installation was broken because commands could not find shared libraries /usr/lib, I was only able to use apps that where already running. I had broken CD and it was not possible to boot from USB and didn't have external drive to backup my data. I thought that machine was broken because it had non-SATA DVD drive and you could only buy new Sata DVD. Fortunately I had firefox running with fireFTP and connected, via WiFI, with ftp to my mother laptop, where I installed ftp server and backup all the data. Few years later I bought used DVD Drive that was working with that laptop and give it to my mother.