# List of popular commands and shortcuts

## Bash

### Previous command
```bash
!0 - command itself
!^ - first argument
!$ - last argument
!* - all arguments
!! - full command
```

### Useable commands
```bash
# step back
cd -
sudo su
```

### To explore
```bash
ag
fzf
fd
```

### Script errors
```bash
set -o errexit
set -o nounset
set -o pipefail
```
### Linux
tldr - basic command usage
usermod - modifu user account

### Tools
- [ShellCheck](https://github.com/koalaman/shellcheck) A shell script static analysis tool
- [direnv](https://direnv.net/) Directory specific variables


## Kubernetes
```bash
# ~/.kube/config
kubectl config get-contexts
kubectl config use-context <context>
```

## AWS
```bash
aws eks update-kubeconfig --name nas
```