Shulou(Shulou.com)06/03 Report--

1. Library file directory / lib / lib64 / usr/lib / usr/lib64 / usr/local/lib / usr/local/lib64 (related to software installation) 2, mount point directory (device files need to be mounted to be used) / mnt/media [root@localhost dev] # mount / dev/sr0 / mnt/mount: block device / dev/sr0 is write-protected Mounting read-only [root@localhost dev] # ls / mnt/CentOS_BuildTag isolinux RPM-GPG-KEY-CentOS-Debug-6EFI Packages RPM-GPG-KEY-CentOS-Security-6EULA RELEASE-NOTES-en-US.html RPM-GPG-KEY-CentOS-Testing-6GPL repodata TRANS.TBLimages RPM-GPG-KEY-CentOS-63 、 Pseudo file system / proc: mapping of system hardware and kernel information / sys: mapping of peripherals Note: the contents of these two directories are empty When booting up, the system will scan the hardware and save the hardware information to these two directories. When the computer is turned off, this information disappears, so the information under these two files is gone. Example: / proc/cpuinfo record cpu information / proc/meninfo record memory information 4, file fragment directory / lost+found which file fragments are saved When you boot again, you will try to find file fragments from here to recover (cannot recover) 5. Compile the software installation directory / opt6, the file types in linux: general files:-directory files:-d device files: character devices (linear devices): C (character) content must be sequentially read and written: for example: keyboard block device: B (block) content can be read and written randomly: for example: hard disk 7, Link file: the link file here actually refers to the shortcut to the file [root@localhost tmp] # ln-s 1.txt nee1.txt [root@localhost tmp] # ls-l nee1.txt lrwxrwxrwx 1 root root 5 Apr 15 21:32 nee1.txt-> 1.txt command pipe file: P socket file: s

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