Quick Reference Sheet: Red-Hat Linux

Here is a full basic to advanced reference sheet for Red Hat Linux with

Basic Commands

• ls: List the contents of the current directory.

• cd: Change directory.

• pwd: Print the working directory.

• mkdir: Create a new directory.

• rmdir: Remove a directory.

• cp: Copy a file or directory.

• mv: Move a file or directory.

• rm: Remove a file or directory.

• touch: Create a new file.

• cat: Concatenate and print files.

• grep: Search for a pattern in a file.

• sudo: Execute a command as the root user.

Package Management

• yum: The default package manager in Red Hat Linux.

• yum install: Install a package.

• yum update: Update all installed packages.

• yum remove: Remove a package.

• yum search: Search for a package.

• yum info: Get information about a package.

• dnf: A newer package manager that is replacing yum in Red Hat Enterprise Linux 8.

• dnf install: Install a package.

• dnf update: Update all installed packages.

• dnf remove: Remove a package.

• dnf search: Search for a package.

• dnf info: Get information about a package.

System Administration

• systemctl: Control system services.

• systemctl start: Start a system service.

• systemctl stop: Stop a system service.

• systemctl enable: Enable a system service to start at boot.

• systemctl disable: Disable a system service from starting at boot.

• ps aux: List all running processes.

• top: Monitor system performance and resource usage.

• df: Display disk usage statistics.

• du: Display disk usage statistics for a directory.

• free: Display memory usage statistics.

• htop: An interactive process viewer.

• useradd: Create a new user account.

• userdel: Delete a user account.

• passwd: Change the password for a user account.

• groupadd: Create a new group.

• groupdel: Delete a group.

• gpasswd: Change the password for a group.

Network Commands

• ifconfig: Display network interface information.

• ip: Configure network interfaces.

• ping: Test network connectivity to a host.

• traceroute: Trace the route of a packet to a host.

• nslookup: Resolve a hostname to an IP address.

• dig: Perform DNS queries.

• netstat: Display network statistics.

• ss: Display socket statistics.

• tcpdump: Capture and analyze network traffic.

• wireshark: A graphical network analyzer.

Other Useful Commands

• man: Display the man page for a command.

• history: Display the command history.

• alias: Create an alias for a command.

• export: Set an environment variable.

• unset: Unset an environment variable.

• find: Find files and directories.

• tar: Create and extract archive files.

• gzip: Compress files.

• bzip2: Compress files.

• unzip: Extract zip archive files.

• tarball: A tar archive file that is compressed with gzip.

• rpm: Manage RPM packages.

• sed: Perform search and replace operations on files.

• awk: Perform pattern matching and processing on files.

• vim: A powerful text editor.

• nano: A simple text editor.

Advanced Commands

• lvm: Logical Volume Management.

• firewalld: Firewall management.

• selinux: Security-Enhanced Linux.

• rsync: Remote file transfer and synchronization.

• ssh: Secure Shell.

• sudoers: Configure sudo permissions.

• cron: Job scheduling.

• sysctl: Configure system kernel parameters.

• module: Load and unload kernel modules.

• strace: Trace system calls.

• ltrace: Trace library calls.

• gdb: GNU Debugger.