Freaks City

Setting up an Rsync daemon on a server enables efficient and secure file mirroring to remote clients. This guide walks through deploying a sync service on 192.168.18.211 to replicate /root/rsync-server/ to a client's /root/rsync-local directory, leveraging CentOS 6.5's built-in rsync capabilities. Verification and Installation Confirm rsync is ...

File Operations: Copy, Move, and Delete In Linux systems, the fundamental commands for file manipulation are cp (copy), mv (move), and rm (remove). ### Copy Command (cp) The cp command follows this syntax: ``` cp [-adfilprsu] source_file destination_file cp [options] source1 source2 source3 ... directory Key parameters include: - `-a`: Archive ...

There are three primary approaches to setting up a Linux environment: Method Description Dual Boot Installing Linux directly on physical hardware alongside another OS. This is generally not recommended due to poor desktop usability. Virtual Machine Running Linux inside software like VMWare. This can be problematic due to software bugs ...

Overview When configuring passwordless SSH login via a bastion host to a target server (e.g., 10.30.3.232), several key step are required. This guide walks through the necessary proces using secure shell (SSH) key-based authentication. Step 1: Check for Existing SSH Keys Log in to the bastion host and switch to the desired user account. Check i ...

Stack Frame Navigation and Memory Inspection When analyzing a crashed application, navigating the call stack is essential. The bt (backtrace) command lists the function calls leading to the current point. To inspect variables within a specific stack frame, use the frame command followed by the frame index. (gdb) bt #0 AsyncWorker::Execute (thi ...

Crontab enables users to schedule commands or scripts at predefined itnervals—minutes, hours, days, months, or weekdays. It is widely used for tasks like log rotation, backups, and system maintenance. Before using crontab, ensure the cron daemon is running: systemctl start cron # Start the service systemctl enable cron # Enable at ...

# Print the last line of a file sed -n '$p' ok.txt # Output total number of lines sed -n '$=' ok.txt # Count blank lines sed -n '/^$/=' ok.txt Line Selection and Printing # Print odd-numbered lines (1st, 3rd, 5th, ...) seq 10 | sed -n '1~2p' # Print even-numbered lines (2nd, 4th, 6th, ...) seq 10 | sed -n '2~2p' Inserting Content sed '5 a ...

When a program executes, the memory addresses it works with are not physcial hardware locations. This distinction becomes clear through the behavior of fork(). Consider the following demonstration. A global integer is initialized, and then a new process is created: #include <stdio.h> #include <unistd.h> #include <stdlib.h> in ...

Creating Files with touch Syntax touch [options] filename Key Options Option Description -m Update modification timestamp -d Set specific datetime Examples # Create file in current directory $ touch example.txt # Create file with absolute path $ touch /tmp/sample.txt # Create multiple files $ touch file1.txt file2.txt file3.txt $ ...

NFS Server Setup Installing Required Packages yum install -y nfs-utils Configuring the Export File Edit the exports configuration file to define which dierctories to share: vim /etc/exports Add the following line to share /data/shared with the specified network: /data/shared 10.0.0.0/24(rw,sync,fsid=0) Configuration options explained: Opt ...