you must be able to edit text files without damaging them. Most parts of the system use plaintext configuration files (like the ones in /etc). It’s not difficult to edit files, but you will do it so often that
The selector is on the left. It’s the type of information to be logged. The list on the right is the action: where to send the log. Most actions in Example 7-1 are normal files, with some exceptions. For example, /dev/console refers to a special device for the system console, r...
$ su - postgres $ psql -c "select client_addr,sync_state from pg_stat_replication;" If no errors are observed, go ahead and stop the DB on all nodes, ahead of cluster configuration: Run from all nodes aspostgresuser to stop the database and replication: ...
Line 7performs a check using anifstatement. When the variable equals two ("$i" == 2), the program exits thewhileloop using the Bashbreakstatement online 10. In that case, the code jumps toline 16. If the variable is a different number, the script continues as expected online 12. Exec...
/bin/bash cat servers.txt | grep -v CPU | while read servername cpu ram ip do echo $ip $servername done [ Learn the basics of using Kubernetes in thisfree cheat sheet. ] Wrap up whileloops are useful in scripts that depend on a certain condition to be true or false, but you can...
On Windows 11, go toSettings -> System -> Storage -> Advanced storage settings -> Where new content is savedand select C Drive here. Select the C-Drive as storage space for new apps in Windows 11 settings 🔧 Troubleshooting Tip 3 ...
This chapter is a guide to the Unix commands and utilities that will be referenced throughout this book. This is preliminary material, and you may ...
If you would like to make the root of your system the root of the active system, run the command: chroot /mnt/sysimage When finished, please exit from the shell and your system will reboot. Please press ENTER to get a shell: <Tab>/<Alt-Tab> between elements | <Space> selects | <...
Enter "backups" in the Search function to find Deja Dup. Select the icon to open the program. Damon Garn Figure 2. Launch the Backups utility. The user interface varies a bit between versions, but it contains the same general categories. ...
When prompted, select pressYand then write the name of the file. After you enter a filename, press theEnterkey to save the file. In this guide, the file is saved as atutorial.txtwith the following content: Open an Existing File Using Nano ...