SCA_SLES15 Exam Dumps and Practice Questions

https://documentation.suse.com/ko-kr/sles/15-SP1/html/SLES-all/cha-network.html

The file that provides local name resolution is /etc/hosts. This file contains mappings of hostnames to IP addresses for hosts on the local network or hosts that are frequently accessed. The system will consult this file before querying DNS servers when resolving hostnames. This can improve performance and security, as well as provide fallback in case DNS servers are unavailable. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-network-dns.html#sec-network-dns-hosts

The UID that the root user has is 0. The UID (user ID) is a numeric value that uniquely identifies a user on the system. The root user is the superuser or administrator who has full privileges and access to all files and commands on the system. The root user always has the UID of 0, regardless of its name or password. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-user-group.html#sec-user-group-root

Subvolumes in BtrFS are like virtual filesystems that can be mounted separately with the -o subvol= option. They can also have different attributes and quotas. Subvolumes do not have to start with ''@'' character, although some default subvolumes use this convention. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-btrfs.html#sec-btrfs-subvolumes

The /mnt directory is traditionally used as a catch all to mount local and/or remote file systems. It is a generic mount point for temporary mounts by the system administrator. It may contain subdirectories for different types of file systems or devices, such as /mnt/cdrom, /mnt/usb, /mnt/nfs, etc. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-storage-mounting.html#sec-storage-mounting-mnt

https://www.gnu.org/software/bash/manual/html_node/Bash-Startup-Files.html

When Bash is invoked as an interactive login shell, or as a non-interactive shell with the--loginoption, it first reads and executes commands from the file/etc/profile, if that file exists. After reading that file, it looks for~/.bash_profile,~/.bash_login, and~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The--noprofileoption may be used when the shell is started to inhibit this behavior.

The first file executed by a bash login shell is /etc/profile. This file sets global environment variables and aliases for all users. It may also source other files in /etc/profile.d/ directory. Reference: https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-startup