VM became unreachable after a peroid of quiet time, but actually it is running verified by remote console

We met a situation in our Production environment that VMs will become unreachable after a peroid of quiet time (no network packets IN or OUT). But actually they are running which I verified by the remote console through vcenter. And after we did a ping or traceroute to other resources inside of VMs, the network…

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Using NFS /home directory with different distributions

I’m following Ubuntu’s official documentation for exporting and mounting NFS. This and other tutorials regularly mention exporting the /home directory and mounting it on the clients to have a central location for all the files. https://help.ubuntu.com/community/SettingUpNFSHowTo I’ve tried searching for this but I haven’t found anything that talks specifically about mounting on different clients distributions.…

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Are there any risks of undefined behavior when calling a function which doesn’t return anything using a prototype of it which returns bool?

According to the ERC-20 Token Standard, functions transfer and transferFrom should return a boolean value indicating success or failure: interface IERC20Token { function transfer(address _to, uint256 _value) public returns (bool); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); } Nevertheless, there are quite a few ERC-20 Token contracts which were deployed on mainnet…

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