You've been given a new device without any documentation. You want to check if Linux has automatically loaded a driver for it. Which command would help you determine this?
- lspci
- dmesg
- lsusb
- udevadm
The dmesg command would help you determine if Linux has automatically loaded a driver for the new device. dmesg displays kernel messages, and you can look for entries related to the device to see if a driver has been loaded or if there are any issues with it.
When debugging a shell script, which option can be used with the bash command to enable debugging output?
- #NAME?
- #NAME?
- #NAME?
- #NAME?
When debugging a shell script, you can use the -x option with the bash command to enable debugging output. This option displays each command as it is executed, making it useful for identifying issues and understanding the script's execution flow.
You are setting up a high-performance database server and require a file system that supports large files and high data integrity. Which file system would be most suitable?
- Ext4
- XFS
- Btrfs
- ZFS
ZFS (Zettabyte File System) would be most suitable for a high-performance database server. It supports large files, data integrity through features like checksums, and provides advanced data management capabilities, making it ideal for critical data storage needs.
The _________ daemon in Linux is responsible for assigning IP addresses to devices on a local network.
- DHCP
- DNS
- SSH
- HTTP
The DHCP (Dynamic Host Configuration Protocol) daemon in Linux is responsible for assigning IP addresses to devices on a local network. It automates the process of configuring network settings for devices, ensuring they receive the necessary IP address, subnet mask, gateway, and other parameters.
In Linux, the ________ command is used to create symbolic links between files.
- connect
- link
- ln
- symlink
In Linux, the "ln" command is used to create symbolic links between files. A symbolic link is a reference to another file or directory, allowing you to access the linked content from a different location in the file system.
You're troubleshooting a software installation issue on a CentOS machine. You suspect a required package might be missing. Which command helps you check if a specific package is installed?
- rpm -q
- dpkg -l
- yum info
- apt-cache policy
On CentOS, you can use the 'rpm -q' command to check if a specific package is installed. This command queries the RPM database to determine if the package is installed on the system.
If a script is called with ./myscript.sh arg1 arg2 arg3, what does $2 represent?
- The total number of arguments passed to the script.
- The name of the script itself (myscript.sh).
- The second argument, which is "arg2".
- The process ID of the script.
In the given example, $2 represents the second argument passed to the script, which is "arg2". It's important to note that in shell scripting, arguments are accessed using positional parameters like $1, $2, $3, and so on.
You are an administrator and receive a report that a user is not able to execute certain commands with sudo. Where would you primarily look to diagnose the issue?
- /etc/sudoers file
- /etc/passwd file
- /var/log/auth.log
- /bin/sudo binary
To diagnose the issue of a user not being able to execute certain commands with sudo, you would primarily look at the /etc/sudoers file. This file contains the configuration for sudo privileges, and it's the first place to check for any restrictions or misconfigurations that might be affecting the user's access.
Which tool in Linux can be used to measure disk input/output statistics?
- iostat
- top
- ps
- df
The iostat tool in Linux is used to measure disk input/output statistics. It provides information about disk utilization, I/O wait times, and other important metrics, helping system administrators monitor and troubleshoot disk performance.
What is the primary purpose of the groupmod command in Linux?
- Modify group attributes
- Add a new group
- Remove a user from a group
- Create a new group
The primary purpose of the groupmod command in Linux is to modify group attributes. You can use groupmod to change properties of an existing group, such as its name or GID (Group ID). It does not create new groups or remove users from groups; it focuses on group attribute modifications.