Sooner or later a data job means logging in to a Linux server over SSH. These commands cover the first weeks.
| Task | Linux | Windows equivalent |
|---|---|---|
| Where am I? | pwd |
cd |
| List files (detailed) | ls -lh |
dir |
| Change folder | cd /var/log |
cd |
| Show a file | cat file.txt, less file.txt |
type |
| Last lines of a log, live | tail -f app.log |
— |
| Search inside files | grep -i "error" app.log |
findstr |
| Find files by name | find . -name "*.csv" |
dir /s |
| Copy / move / delete | cp / mv / rm |
copy / move / del |
| Make a folder | mkdir -p a/b |
mkdir |
| Disk space | df -h, du -sh * |
— |
| Running processes | top, ps aux |
Task Manager |
| Permissions | chmod 644 file |
— |
| Run as admin | sudo command |
Run as administrator |
| Download | curl -O URL |
curl |
| Zip / unzip | tar -czf a.tgz folder, unzip f.zip |
Compress |
Pipes: small tools, big results
grep "ERROR" app.log | cut -d' ' -f1 | sort | uniq -c | sort -rn | head“Count errors per day, most first” — five tiny commands joined with |.
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