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dbaplus Community
dbaplus Community
May 18, 2026 · Information Security

One Bash Script, One Weekend: How AI Uncovered a 23‑Year‑Old Linux Kernel Flaw

A simple Bash script run over a weekend by researcher Nicholas Carlini leveraged Claude Opus 4.6 to discover a critical NFSv4 vulnerability that had persisted in Linux kernels since March 2003, prompting Linus Torvalds to announce AI‑driven security as a new normal in the Linux 7.0 release.

AI-assisted Vulnerability DetectionKernel SecurityLinux
0 likes · 19 min read
One Bash Script, One Weekend: How AI Uncovered a 23‑Year‑Old Linux Kernel Flaw
Xiao Liu Lab
Xiao Liu Lab
Jan 17, 2026 · Operations

Recover Accidentally Deleted XFS Files in Minutes with xfs_undelete

This guide walks Linux administrators through why xfs_undelete is the preferred XFS recovery tool, how to install it in under five minutes, and step‑by‑step commands—including basic, time‑filtered, and type‑filtered recovery—plus three real‑world scenarios, advanced tips, and common pitfalls.

Data RecoveryFilesystemLinux
0 likes · 13 min read
Recover Accidentally Deleted XFS Files in Minutes with xfs_undelete
Linux Kernel Journey
Linux Kernel Journey
Nov 10, 2025 · Fundamentals

Multithreaded Parallel Writeback: Vivo’s Exploration of Page Cache Write Acceleration

The article examines Linux's page‑cache writeback mechanism, explains why the single‑threaded writeback path becomes a bottleneck under heavy writes, and details Vivo's multithreaded writeback patches—including inode‑to‑context mapping and sysfs‑controlled thread counts—that achieve up to 2.4 GB/s on XFS and a 22 % speedup on F2FS, while also discussing fragmentation trade‑offs and optimal thread‑to‑allocation‑group ratios.

F2FSFilesystemLinux
0 likes · 8 min read
Multithreaded Parallel Writeback: Vivo’s Exploration of Page Cache Write Acceleration
Tencent Architect
Tencent Architect
Jan 23, 2024 · Fundamentals

XFS Deep Dive: Layout, Inode Management, and Read/Write Operations

This article analyzes the XFS filesystem implementation in the Linux kernel, covering its on‑disk layout, superblock and allocation‑group structures, inode and free‑space B+ trees, operation sets (iops, fops, aops), file creation, write and read paths, logging, block layer interactions, and useful XFS utilities.

FilesystemKernelXFS
0 likes · 12 min read
XFS Deep Dive: Layout, Inode Management, and Read/Write Operations
IT Services Circle
IT Services Circle
Nov 15, 2022 · Operations

Recovering a Linux Server Stuck in Rescue Mode and Re-mounting a Data Disk without Formatting

This article describes a step‑by‑step process for diagnosing a Linux server that entered rescue mode after an illegal reboot, using journalctl and systemctl commands, checking disk status, repairing an XFS filesystem with xfs_repair, and safely unmounting, re‑formatting, and re‑mounting the data partition without losing existing data.

Disk MountFilesystem RepairLinux
0 likes · 7 min read
Recovering a Linux Server Stuck in Rescue Mode and Re-mounting a Data Disk without Formatting
Liangxu Linux
Liangxu Linux
Aug 21, 2022 · Operations

How to Expand a Linux Root Partition with LVM in Minutes

Learn step‑by‑step how to enlarge a Linux root filesystem using LVM commands—checking disk usage, creating a physical volume, extending the volume group and logical volume, and resizing the XFS filesystem—complete with command examples and verification screenshots.

Disk ExpansionLVMLinux
0 likes · 5 min read
How to Expand a Linux Root Partition with LVM in Minutes
Liangxu Linux
Liangxu Linux
Jul 10, 2022 · Operations

How to Expand an XFS Root Partition on Linux Without LVM

This guide walks you through checking the current XFS root size, enlarging the virtual disk in VMware, installing the growpart utility, extending the root partition, resizing the XFS filesystem with xfs_growfs, and verifying the new 40 GB capacity, while noting important constraints such as the need for no following partitions.

Disk ExpansionLinuxRoot Partition
0 likes · 5 min read
How to Expand an XFS Root Partition on Linux Without LVM
ITPUB
ITPUB
Nov 12, 2020 · Operations

How to Shrink /home and Expand Root Partition on a Linux Log Server

This guide explains how to shrink the /home partition, install missing fuser, resize the filesystem, and expand the root directory on a CentOS/RHEL 7 log server, including commands for unmounting, killing processes, resizing ext4 or xfs partitions, and re‑mounting the filesystem.

LinuxPartitionSysadmin
0 likes · 4 min read
How to Shrink /home and Expand Root Partition on a Linux Log Server
Liangxu Linux
Liangxu Linux
Nov 9, 2020 · Operations

How to Shrink /home and Expand the Root Partition on CentOS 7

This guide explains how to safely reduce the /home partition size, free up space, and extend the root filesystem on a CentOS 7 server by unmounting /home, locating and terminating lingering processes, resizing the filesystem, installing required tools, and remounting the adjusted partitions.

CentOSLinuxPartition
0 likes · 4 min read
How to Shrink /home and Expand the Root Partition on CentOS 7
ITPUB
ITPUB
Oct 16, 2020 · Operations

What CDN Architecture Evolution Says About the Future of IT and Storage

In an interview, ByteDance edge‑computing architect Zhou Chaoyong explains how CDN and storage architectures have evolved with rising data demands, predicts NVMe's dominance in the storage market, and previews his upcoming SACC 2020 talk on high‑performance XFS storage systems.

CDNEdge ComputingIT Architecture
0 likes · 9 min read
What CDN Architecture Evolution Says About the Future of IT and Storage
ITPUB
ITPUB
Jul 19, 2019 · Operations

How to Shrink /home and Expand Root on CentOS 7

This guide walks through shrinking the /home partition, extending the root filesystem on a CentOS 7 server, handling busy mount issues, installing missing tools like fuser and xfsdump, resizing XFS, and safely remounting the partitions.

CentOSLinuxPartitioning
0 likes · 2 min read
How to Shrink /home and Expand Root on CentOS 7
MaGe Linux Operations
MaGe Linux Operations
Jul 25, 2018 · Fundamentals

Mastering XFS: Features, Installation, and Migration on Linux

This article explains the XFS file system’s key features such as data integrity, performance, scalability and bandwidth, and provides step‑by‑step instructions for downloading kernel patches, enabling XFS support, compiling the kernel, creating and mounting XFS partitions, and migrating existing Linux systems to XFS.

FilesystemLinuxXFS
0 likes · 8 min read
Mastering XFS: Features, Installation, and Migration on Linux
21CTO
21CTO
May 28, 2018 · Operations

Git Server CPU Spike After Migration: Insights into SSHD, XFS Locks, and PAM

After moving a Git server to a new data center, CPU sys time surged due to thousands of sshd processes contending on XFS read‑write locks while repeatedly reading a massive /var/log/btmp file caused by PAM postlogin, and the analysis shows how perf, strace and log rotation can resolve the issue.

CPUXFSpam
0 likes · 11 min read
Git Server CPU Spike After Migration: Insights into SSHD, XFS Locks, and PAM
MaGe Linux Operations
MaGe Linux Operations
Oct 11, 2014 · Operations

How to Create, Quota, and Expand an XFS Filesystem on RHEL/CentOS 7

This guide walks through creating an XFS filesystem on a new partition, configuring LVM physical, volume, and logical volumes, formatting with XFS, enabling user and group quotas, assigning quota limits, testing quota enforcement, and finally expanding the logical volume and growing the XFS filesystem.

FilesystemXFSquota
0 likes · 11 min read
How to Create, Quota, and Expand an XFS Filesystem on RHEL/CentOS 7