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You want ensure an ext3 filesystem is checked every 50 times it is mounted. Which command would you use?
The command that is used to ensure an ext3 file system is checked every 50 times it is mounted is tune2fs. The tune2fs command can be used to adjust various parameters of an ext2, ext3, or ext4 file system. The -c option can be used to set the maximum number of mounts between two file system checks. For example, tune2fs -c 50 /dev/sda1 will set the check interval to 50 mounts for /dev/sda1. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-tune2fs.html
Assume you need to make the third menu entry of your GRUB2 boot menu your default menu selection. What tasks must be completed to accomplish this? (Choose two)
To make the third menu entry of your GRUB2 boot menu your default menu selection, you need to do the following tasks:
Edit the /etc/default/grub file and set GRUB_DEFAULT to 2
Run the grub2-mkconfig command
The /etc/default/grub file contains various settings for the GRUB2 boot loader, such as the default menu entry, the timeout value, the theme file, etc. The GRUB_DEFAULT setting can be set to a numeric value that corresponds to the menu entry index (starting from 0), or a string value that matches the menu entry title. The grub2-mkconfig command will generate a new /boot/grub2/grub.cfg file based on the settings in /etc/default/grub and other configuration files and scripts. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-grub2-config.html#sec-grub2-config-default
What is the default port a VNC Client uses to connect?
https://en.wikipedia.org/wiki/Virtual_Network_Computing#:~:text=VNC%20by%20default%20uses%20TCP,Java%2Denabled%20web%2Dbrowser.
VNC by default usesTCP port5900+N,[6][7]whereNis the display number (usually :0 for a physical display). Several implementations also start a basicHTTPserveron port 5800+Nto provide a VNC viewer as aJava applet, allowing easy connection through any Java-enabled web-browser. Different port assignments can be used as long as both client and server are configured accordingly. A HTML5 VNC client implementation for modern browsers (no plugins required) exists too.[8]
The default port a VNC Client uses to connect is TCP 5901. This port corresponds to the first display number (:1) of the VNC server. Each display number has its own port number, starting from 5900. For example, display :2 uses port 5902, display :3 uses port 5903, and so on. The user can specify a different port number if needed. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-vnc-connect.html
Which commands can be used to terminate processes? (Choose two)
The commands that can be used to terminate processes are kill and killall. The kill command can be used to send a signal to a process specified by its process ID (PID). The default signal is SIGTERM, which requests a graceful termination of the process. The killall command can be used to send a signal to one or more processes specified by their name. It will match all processes that belong to the current user unless otherwise specified. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-processes.html#sec-cli-processes-kill
Which bash commands result in a valid arithmetic expansion? (Choose three)
The bash commands that result in a valid arithmetic expansion are:
TOTAL=$[8/2]
TOTAL=$((5+2))
((TOTAL++))
Arithmetic expansion is a bash feature that allows you to perform integer calculations and assign or use the result in a command or expression. There are two syntaxes for arithmetic expansion: [expression]and((expression)). The expression can contain variables, operators, parentheses, etc. The ((expression)) syntax can also be used without the $ sign for assignments or conditional tests. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-arithmetic
