How to backup and restore system in CentOS
Apr 14, 2025 pm 05:54 PMCentOS System Backup and Recovery Guide: Detailed explanation of three common methods
This article will introduce three common methods for system backup and recovery in CentOS system, and provide detailed command examples and precautions to help you choose the most suitable backup plan.
Method 1: Backup and restore using the tar command
The tar command is an efficient archiving tool that can package files and directories into compressed files.
Backup:
tar cvpzf backup.tgz --exclude=/proc --exclude=/lost found --exclude=/mnt --exclude=/sys /
This command backs up the entire system to a compressed file named backup.tgz
and excludes directories such as /proc
, /lost found
, /mnt
and /sys
that do not require backup.
recover:
tar xvpfz backup.tgz -C /
This command extracts the backup.tgz
file to the root directory of the system /
.
Method 2: Backup and restore using rsync command
rsync is a powerful file synchronization tool that can be used for local or remote backups.
Backup:
rsync -av --delete /source_directory /destination_directory
Synchronize all contents in the /source_directory
directory to the /destination_directory
directory. The -a
option represents the archive mode, the -v
option represents the detailed mode, and the --delete
option represents the delete file that does not exist in the source directory in the target directory.
recover:
rsync -av /source_directory /destination_directory
Synchronize all contents in the /source_directory
directory to the /destination_directory
directory.
Method 3: Backup and restore using the dd command (use with caution)
The dd command can directly backup the disk and generate disk image files. This method is risky and improper operation may lead to data loss. Please be sure to operate with caution!
Backup:
dd if=/dev/sda of=backup.img bs=4M
This command backs up the /dev/sda
disk to the backup.img
file, bs=4M
specifies that the block size is 4MB, which speeds up the backup speed. Please replace /dev/sda
with your actual disk device name.
recover:
dd if=backup.img of=/dev/sda bs=4M
This command writes the backup.img
file to the /dev/sda
disk. Please replace /dev/sda
with your actual disk device name.
Important notes:
- Backup space: Make sure there is enough storage space to save backup files.
- Data security: Backup and recovery operations may lead to data loss. Please be sure to operate with caution and backup data in advance.
- Integrity check: Check the integrity and availability of backup files regularly to ensure normal recovery.
- Device name: When using the
dd
command, be sure to confirm that the disk device name is correct, otherwise it may lead to serious data loss.
Which method to choose depends on your specific needs and technical level. For ordinary users, the tar
command may be easier to use; for users who need more granular control and synchronization functions, the rsync
command is a better choice; the dd
command is suitable for scenarios where a full disk image backup is required, but the risk is also higher. Please choose the appropriate method according to the actual situation.
The above is the detailed content of How to backup and restore system in CentOS. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

There is no legal virtual currency platform in mainland China. 1. According to the notice issued by the People's Bank of China and other departments, all business activities related to virtual currency in the country are illegal; 2. Users should pay attention to the compliance and reliability of the platform, such as holding a mainstream national regulatory license, having a strong security technology and risk control system, an open and transparent operation history, a clear asset reserve certificate and a good market reputation; 3. The relationship between the user and the platform is between the service provider and the user, and based on the user agreement, it clarifies the rights and obligations of both parties, fee standards, risk warnings, account management and dispute resolution methods; 4. The platform mainly plays the role of a transaction matcher, asset custodian and information service provider, and does not assume investment responsibilities; 5. Be sure to read the user agreement carefully before using the platform to enhance yourself

Bitcoin halving affects the price of currency through four aspects: enhancing scarcity, pushing up production costs, stimulating market psychological expectations and changing supply and demand relationships; 1. Enhanced scarcity: halving reduces the supply of new currency and increases the value of scarcity; 2. Increased production costs: miners' income decreases, and higher coin prices need to maintain operation; 3. Market psychological expectations: Bull market expectations are formed before halving, attracting capital inflows; 4. Change in supply and demand relationship: When demand is stable or growing, supply and demand push up prices.

The latest price of Dogecoin can be queried in real time through a variety of mainstream APPs and platforms. It is recommended to use stable and fully functional APPs such as Binance, OKX, Huobi, etc., to support real-time price updates and transaction operations; mainstream platforms such as Binance, OKX, Huobi, Gate.io and Bitget also provide authoritative data portals, covering multiple transaction pairs and having professional analysis tools. It is recommended to obtain information through official and well-known platforms to ensure data accuracy and security.

Cardano's Alonzo hard fork upgrade has successfully transformed Cardano from a value transfer network to a fully functional smart contract platform by introducing the Plutus smart contract platform. 1. Plutus is based on Haskell language, with powerful functionality, enhanced security and predictable cost model; 2. After the upgrade, dApps deployment is accelerated, the developer community is expanded, and the DeFi and NFT ecosystems are developing rapidly; 3. Looking ahead to 2025, the Cardano ecosystem will be more mature and diverse. Combined with the improvement of scalability in the Basho era, the enhancement of cross-chain interoperability, the evolution of decentralized governance in the Voltaire era, and the promotion of mainstream adoption by enterprise-level applications, Cardano has

The cryptocurrency market in 2025 is still full of opportunities, and choosing a suitable app is the first step to success. Before making a decision, it is recommended that users comprehensively consider their trading experience, product types of interest, and preferences for functional complexity. Most importantly, no matter which platform you choose, asset security should be put first and always maintain a learning mindset to adapt to this rapidly changing market.

Binance is the platform with the largest trading volume of BTC, providing rich digital assets and a strong ecosystem; 2. OKX has comprehensive functions, stable technology, and a wide user base; 3. Coinbase is known for its compliance and security, suitable for European and American users; 4. HTX is known for its derivatives trading and outstanding performance in the spot market; 5. Kraken has a long history and excellent security record; 6. KuCoin provides a large number of emerging projects, suitable for users looking for potential assets; 7. Upbit is a leader in the Korean market, driven by Korean won trading pairs; 8. Gate.io has a rich variety of online currencies, which is very popular among early investors; 9. Bitstamp is an old platform, known for its reliability and security; 10. MEXC

PEPE coins are altcoins, which are non-mainstream cryptocurrencies. They are created based on existing blockchain technology and lack a deep technical foundation and a wide application ecosystem. 1. It relies on community driving forces to form a unique cultural label; 2. It has large price fluctuations and strong speculativeness, and is suitable for those with high risk preferences; 3. It lacks mature application scenarios and relies on market sentiment and social media. The prospects depend on community activity, team driving force and market recognition. Currently, it exists more as cultural symbols and speculative tools. Investment needs to be cautious and pay attention to risk control. It is recommended to rationally evaluate personal risk tolerance before operating.

In the world of digital currency trading, understanding and proficiency in using different order types is the key to successful transactions. It's as basic as driving a vehicle requires mastering the accelerator and brakes. Market orders and restricted orders are the two most basic and powerful tools that all traders must master. Whether you operate on mainstream trading platforms such as Binance Binance, Ouyi OKX, Huobi, or Gate.io Sesame Open Door, they all form the core of your trading strategy.
