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RHCSA - RHEL 7 (EX200) Questions and Answers
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RHCSA - RHEL 7 (EX200) Questions and Answers
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RHCSA - RHEL 7 (EX200) Questions and Answersaccess a shell prompt and issue commands with correct syntax - ANS-press the "Alt" +
"Ctrl" + "FX" keys (FX = F1-F6)
OR
GUI: Applications > System Tools
4 types of command shells
- bash (Bourne Again Shell)
- ksh (Korn Shell)
- tcsh
- zsh
access remote systems using SSH - ANS-The remote system must have "sshd"
installed, along with a username, password and domain name or IP address configured.
The remote system is accessed with the command, "ssh [username]@[domain name or
IP address of remote system]"
archive, compress, unpack and decompress files using tar, star, gzip, and bzip2 - ANS--
"tar" = archive files
- "tar xzvf [filename] [directory] = unpacks files
- "star" = archives files in SELinux systems
- "gzip" = compresses & decompresses files, using the DEFLATE algorithm
- "bzip2" = compresses & decompresses files, using the Burrows-Wheeler algorithm
bzip2 has a better compression ratio than gzip
boot systems into different targets manually - ANS-- press the "e" key at the GRUB
menu to edit it
- scroll down with the "↓" key
- locate the kernel command line, which is the line that starts with the "linux16" directive
- add kernel parameters to the end of the line, "systemd.unit=[emergency | multi-user |
rescue].target"
- press the "ctrl" and "x" keys
"graphical.target" is the default target in a GUI environment
boot, reboot and shut down a system normally - ANS-- "systemctl poweroff" = shuts
down a system normally
- "systemctl reboot" = reboots a system normally
create and edit text files - ANS-- "touch [filename]" = creates a file
- "vi [filename]" = edits a file in the Vim text editor
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