Issue I create a few aliases in terminal like below: alias k=kubectl source <(kubectl completion bash) And then I open a tmux session with command: tmux. Now inside of tmux pane, when I try using the alias and expect the behaviour of source command run in terminal, it fails! :( Why does this happen and how do I get it right? The context is that I end up using multiple panes in tmux and I don't want to re-peat the same set of aliases creation again and again as I open every tmux pane. Possible? Side Note: If you don't know this, it might be another cause for your stress during your CKA/CKAD exam.