101-500 VCE Exam Download

The correct command to make /bin/foo executable by everyone but writable only by its owner is chmod u=rwx,go=rx /bin/foo. This command uses the symbolic method to set the permissions for the user (u), group (g), and others (o) classes. The equal sign (=) means that the permissions are set exactly as specified, not added or removed. The letters r, w, and x represent the read, write, and execute permissions respectively. The comma (,) separates the different classes. The command means that the user has read, write, and execute permissions (rwx), while the group and others have only read and execute permissions (rx). The other options are incorrect because they use the wrong syntax or values for the chmod command. Option B uses the wrong indicators for the classes. The letter o means others, not owner. The letter a means all, not group. Option C uses the numeric method, but the value 577 is not correct. The numeric method uses octal numbers (0-7) to represent the permissions for each class. The first digit is for the user, the second for the group, and the third for others. Each digit is the sum of the values for the read (4), write (2), and execute (1) permissions. For example, 7 means rwx, 6 means rw-, 5 means r-x, and so on. The value 577 means that the user has read, write, and execute permissions (rwx), the group has read and execute permissions (r-x), but the others have only write and execute permissions (w-x), which is not what the question asked. Option D uses the numeric method, but the value 775 is not correct. The value 775 means that the user and the group have read, write, and execute permissions (rwx), while the others have only read and execute permissions (r-x). This means that the group can also write to the file, which is not what the question asked. References:

• [LPI Linux Essentials - 1.3 Basic File Management]
• [LPI Linux Essentials - 2.1 Using Devices, Linux Filesystems, Filesystem Hierarchy Standard]
• [LPI Linux Essentials - 2.2 Mounting, Unmounting Filesystems]
• [LPI Linux Essentials - 2.3 Disk Partitions]
• How to Use the chmod Command on Linux - How-To Geek
• Chmod Command in Linux (File Permissions) | Linuxize
• Chmod command in Linux with examples - GeeksforGeeks

The correct command to locate programs and their corresponding man pages and configuration files is whereis. The whereis command searches for the binary, source, and manual files for a given command name in a list of standard Linux directories. It can also accept a list of directories to search in by using the -B, -M, or -S options. The whereis command is useful for finding the location and documentation of a program. The other commands are not suitable for this task. The dirname command strips the last component from a file name and returns the directory name. The which command shows the full path of a command that is in the $PATH variable. The basename command strips the directory and suffix from a file name and returns the base name. The query command is not a standard Linux command. References:

• [LPI Linux Essentials - 1.1 The Linux Community and a Career in Open Source]
• [LPI Linux Essentials - 1.2 Finding Your Way on a Linux System]
• [LPI Linux Essentials - 1.4 Finding Files]
• whereis command in Linux with Examples - GeeksforGeeks
• Whereis Command in Linux | Linuxize
• Linux whereis Command Explained for Beginners (5 Examples) - HowtoForge
• whereis command | Linux# - Geek University
• whereis command in Linux - LinuxForDevices

The correct command to change the ownership of file.txt to the user dan and the group staff is chown dan:staff file.txt. This command uses the colon (:) as a separator between the user and the group. The other options are incorrect because they use the wrong syntax or options for the chown command.Option A uses a slash (/) instead of a colon, which is not valid. Option C uses the -u and -g options, which are not supported by the chown command. Option D uses the -g option, which only changes the group, not the user. References:

• [LPI Linux Essentials - 1.3 Basic File Management]
• [LPI Linux Essentials - 2.1 Using Devices, Linux Filesystems, Filesystem Hierarchy Standard]
• [LPI Linux Essentials - 2.2 Mounting, Unmounting Filesystems]
• [LPI Linux Essentials - 2.3 Disk Partitions]
• Chown Command in Linux: How to Change File Ownership - phoenixNAP
• chown command in Linux with Examples - GeeksforGeeks
• Chown Command in Linux: How to Use It - Help Desk Geek
• Chown Command in Linux (File Ownership) | Linuxize

The correct command to change the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting is tune2fs -i 200 /dev/sda1. This command sets the interval between two filesystem checks to 200 days. The tune2fs command allows you to view and change various filesystem parameters on Linux ext2, ext3, or ext4 filesystems. The -i option specifies the time interval between checks. The other options are incorrect because they use the wrong parameters for the tune2fs command. Option A is wrong because the -d option is not supported by the tune2fs command. Option B is wrong because the -c option sets the maximum number of mounts, not days, before a check. Option D is wrong because the -n option is not supported by the tune2fs command. Option E is wrong because the --days option is not supported by the tune2fs command. References:

• [LPI Linux Essentials - 2.2 Mounting, Unmounting Filesystems]
• 15 tune2fs command examples in Linux [Cheat Sheet] - GoLinuxCloud
• Linux tune2fs command With Examples - GeeksforGeeks
• tune2fs command-file system management - Linuxstar
• tune2fs Command Examples - Gianforte School of Computing