Questions Sysadmin

Questions

Les questions ci-dessous sont issues de cette page. Je vais me contenter pour l'instant des questions Junior / Sysadmin, essayer d'y répondre, et voir celles auxquelles je ne peux pas répondre.

Junior

Systeme

> Give some examples of Linux distribution. What is your favorite distro and why? What are the differences between Unix, Linux, BSD, and GNU? What is a CLI? Tell me about your favorite CLI tools, tips, and hacks. What is your favorite shell and why? How do you get help on the command line? *** Your first 5 commands on a *nix server after login. What do the fields in ls -al output mean? How do you get a list of logged-in users? What is the advantage of executing the running processes in the background? How can you do that? Before you can manage processes, you must be able to identify them. Which tools will you use? *** Running the command as root user. It is a good or bad practices? How to check memory stats and CPU stats? What is load average? Where is my password stored on Linux/Unix? How to recursively change permissions for all directories except files and for all files except directories? Every command fails with command not found. How to trace the source of the error and resolve it? You typing CTRL + C but your script still running. How do you stop it? *** What is grep command? How to match multiple strings in the same line? Explain the file content commands along with the description. SIGHUP, SIGINT, SIGKILL, and SIGTERM POSIX signals. Explain. What does kill command do? What is the difference between rm and rm -rf? How do I grep recursively? Explain on several examples. *** archive.tgz has ~30 GB. How do you list content of it and extract only one file? Execute combine multiple shell commands in one line. What symbolic representation can you pass to chmod to give all users execute access to a file without affecting other permissions? How can I sync two local directories? Many basic maintenance tasks require you to edit config files. Explain ways to undo the changes you make. You have to find all files larger than 20MB. How you do it? Why do we use sudo su - and not just sudo su? How to find files that have been modified on your system in the past 60 minutes? What are the main reasons for keeping old log files? What is an incremental backup? What is RAID? What is RAID0, RAID1, RAID5, RAID6, RAID10? How is a user’s default group determined? How would you change it? What is your best command line text editor for daily working and scripting? *** Why would you want to mount servers in a rack?