12 Linux recovery tools

Computer crashes, hard disks crash, and a huge amount of money is spent to create an emergency protector & hellip; this is the dark side of the computer. Do you accidentally delete your commemorative image? When installing a new system, delete partition tables? Cannot read data in the old CD? Don't worry. we will recommend some free system first aid...

Computer crashes, hard disk crashes, and a huge amount of money is spent on an emergency protector ...... This is the dark side of computers.
Do you accidentally delete your commemorative image? When installing a new system, delete partition tables? Cannot read data in the old CD? Don't worry. we will recommend some free system emergency tools to free you from your helplessness.
You can use the package manager to install the following programs and search for the program name to install them. Let's just give a brief introduction. for details, see the introduction of each software.
1. Photorec-recover lost data from various crashed media
You do not have to erase your hard disk data. an "rm" command may help you with improper use. the graphic environment is just as rational as it is, and the data you accidentally deleted can be restored. But how can I restore the holiday photos on my CF card?

PHOTOREC: restores and deletes files about a week ago. it supports over 300 popular file formats, including ZIP, HTML, PDF, and JPG. No matter what file system, supports hard disk, USB, memory card, iPods, etc., can read data on FAT, NTFS, EXT2/3 and HFS + partition.
2. e2fscktools -- check and correct the file system
This tool detects and fixes EXT2, EXT3, and EXT4 file systems. For other file systems, you can use xfs _ repair, jfs_fsck, and fsck. resiserfs for detection and repair.

E2FSCK: you can use e2fsck to mark the disk partition.
3. ntfsresize -- change the NTFS partition size
Generally, mainstream Linux versions include this version, which helps you change the size of Windows 32-bit 64-bit partition. It can detect the error of the NIFS partition and increase or decrease the file system.
4. FSArchiver -- Copy the entire partition
An effective way to avoid disk damage is to back up the disk. This tool can compress data and save space. backup data is in read-only format.
5. chntpw -- reset the Windows password
If you forget the Windows password, use the chntpw tool to reset the password.
6. Sfdisk -- backup partition table
If you install multiple systems, it is easy to cause confusion in partition tables. This tool is bound to various Linux release versions and can be used to back up, edit, and restore partition tables.

Use sfdisk-d/dev/sda> sda_table.txt to back up the partition table; sfdisk/dev/sda <sda_table.txt to restore the partition table.
If RAID is installed, use sfdisk-d/dev/sda | sfdisk/dev/sdb to back up the partition table.
7. ddrescue -- rebuilding damaged disk
Reading errors often occur in older hard disks.

Use DDRESCUE to back up and destroy the disk, and then try to fix the backup.
8. Rsync -- Remote Backup
You can use Grsync for backup.

9. GAG-advanced bootstrap
If multiple systems are installed and MBR is easily damaged, you can switch to the GAG boot program.
Install GAG in the primary partition or logical partition to guide nine different operating systems. the configuration is simple.

Although it is a graphical interface, most operations still rely on the keyboard.
10. Inquisitor-hard disk test
Test the hard disk from time to solve the problem early. Inquisitor live CD has many modules to test various things, such as hard disk, hard disk controller, USB, CPU, memory and so on.
11. chkrootkit -- detects rootkits
Use this tool to detect installation conditions with many well-known rootkits and scan intruders.
12. md5deep -- search for lost files
If your system leaks, intruders may use malicious files instead of the original files. Use md5deep to record the system file hash directory. Use this tool to find the lost file through hash.

Author: "Daily Yunhui"