Putting It Together

A small end-to-end exercise that uses almost everything from the last five chapters in one sitting.

You’ve just SSH’d into a server. Here’s a realistic sequence, start to finish:

ssh alice@192.168.1.10

pwd
ls -la

mkdir devops
cd devops

touch application.log
echo "Application started" > application.log
echo "Database connected" >> application.log

cat application.log
grep Database application.log

ls -l application.log
chmod 644 application.log
ls -l application.log

Notice what’s happening: navigation (pwd, ls, cd), file creation (mkdir, touch), writing to a file (>, >>), reading it back (cat, grep), and finally checking + fixing its permissions. That loop — create, write, inspect, secure — is basically the shape of a huge amount of real DevOps work.