second extended file system (referred to as ext2 or ext2) for many years It has become the default file system for GNU/Linux. Ext2 replaces the extended file system (this is the predecessor of the second generation & rdquo;). It corrected some of its predecessors and broke some restrictions. Ext2 follows the consistent standards of the UNIX® class file system. From its first day of existence, ext2 is destined to evolve while providing robustness and high performance.
Ext3
The third extended file system can be seen from the name as the successor to ext2. It is compatible with ext2 and improves support for logging.
ext2 One of the main drawbacks of this "traditional" file system is that it cannot withstand a sudden system crash (blackout or software crash). In general, once the system is restarted again, the last crash will cause the system to check the structure of the file system for a long time and try to correct the error. These processes sometimes cause the problem to be partially enlarged and eventually result in the loss of some or all of the saved files. The above problem is solved by using logs. For the sake of simplicity, let's assume that we have already recorded this command before actually executing a command (such as saving a file). This operation is like the captain recording the daily events on the logbook. Records are all closely related file systems. The problem will be confirmed quickly after the problem occurs, and the final repair method will be limited to a small range. The time taken to determine file system problems is proportional to the time used by the system rather than the size of the file system. Ext3 provides a journaling file system while using the ext2 structure to ensure compatibility. This makes it easy to convert between ext2 and ext3.
ReiserFS
Unlike ext3, reiserfs is created out of thin air. It is a log file system like ext3, but it is very different from ext3 in its internal structure due to the binary tree concept introduced from database software.
JFS
JFS is a journaling file system designed and used by IBM. It was originally a private and closed system. But IBM later decided to open it to open source software. It has an internal structure similar to reiserfs.
XFS
XFS is a journaling file system designed by SGI and is also used in the Irix operating system. It was originally a private and closed system, but later SGI decided to open it to open source software. Its internal structure has a lot of special features, such as support for real-time bandwidth, extensions and cluster-based file systems (not included in the free version)
This is a comparison chart of several file systems: (2) using NTFS -3G: We often encounter U disk or mobile hard disk that wants to access the file system as ntfs on Linux system. It can't be mounted every time it is plugged in. It is very distressing: we must use ntfs-3g at this time. This tool is used to mount devices on the nfts file system. What is NTFS-3G? NTFS-3G is an open source project developed and maintained by Tuxera to provide drivers for NTFS partitions for Linux. Read and write file systems for Windows NT (including Windows 2000, Windows XP, Windows Server 2003, and Windows Vista) safely and quickly. Install ntfs-3g: Configure and install: Then we look at the current nfts devices: we can see that there are three ntfs devices in the hard disk /dev/sdc. We tried to mount /dev/sdc1 to /mnt: we successfully mounted and were able to read and write content to the device. 3. Summary This trick allows us to mount ntfs devices, eliminating the incompatibility between linux and windows.
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1.Last Command
Introduction to linux last Command
Description: Lists information about users who have logged into the system in the past.
Syntax: last [-adRx][-f
-d ] [ -k
The arping command can be used to test the connectivity between hosts on the LAN and test wh
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