Red Hat

• RHCSA 8
• RHCE 9

RHCSA 8

• Understand and use essential tools
• Create simple shell scripts
• Operate running systems
• Configure local storage
• Create and configure file systems
• Deploy, configure, and maintain systems
• Manage basic networking
• Manage users and groups
• Manage security
• Manage containers
• RHCSA Exercises

Understand and use essential tools

1. Programmable completion for bash is provided in the bash-completion module. To install this module:

   sudo dnf install bash-completion
   

2. Access a shell prompt and issue commands with correct syntax

   • Common commands and their options, as well as vim usage, are shown below: | Command | Options | Description | |----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------| | ls | -h (human readable) <br> -a (show hidden) <br> -l (detailed) <br> -lt (newist file first) <br> -ltr (oldest file first) | List of files and directories | | pwd | | Print working directory | | cd | ~ (home) <br> / (root) <br> - (switch) <br> .. (parent) | Change directories | | who | whoami (show user) | Show logged in users | | what | w (shorthand) | Show logged in users with more detail | | uptime | | Show system uptime | | logname | | Show real username (if using su) | | id | | Shows a user's UID, username, GUID etc. | | groups | | Lists groups for users | | last | | List all user logins and system reboots | | lastb | | List all failed login attempts | | lastlog | | List recent logins | | uname | -a (details) | System information | | hostnamectl | set-hostname | View hostname | | clear | | Clear the screen | | timedatectl | set-time <br> list-timezones <br> set-timezone <br> | Display system time | | date | --set | View system date | | which | | Show path to a command | | wc | | Word count | | lspci | -m (legible) | PCI buses details | | lsusb | | USB buses details | | lscpu | | Processor details | | gzip/bzip2 | -d (uncompress) | Compress files | | gunzip/bunzip2 | | Uncompress files | | tar | -c (create) <br> -f (specifies name) <br> -v (verbose) <br> -r (append to existing) <br> -x (extract) <br> -z (compress with gzip) <br> -j (compress with bzip2) | Archive file | | star | | Enhanced tar | | man | -k (keyword) <br> -f (short description) | Manual | | mandb | | Update the mandb | | ssh | -l (as different user) | SSH to another Linux system | | tty | | Display terminal name | | whatis | | Search the command in the mandb for description | | info | | More detailed than man | | apropos | | Search the command in the mandb | | grep | -n (show line numbers) <br> -v (pattern exclusion) <br> -i (case insensitive) <br> -E (use alternation) <br> -w (word match) | Find text |

     | Key | Description | |--------------------------|---------------------------------| | i | Change to insert mode | | h, j, k, l | Move left, down, up, right | | w, b, e, ge