Check File

In many cases, we want to know how much space the individual files and directories on the hard disk are using. And the total space occupied by a directory. The du command can help us. After we enter the terminal, we can use this command in any directory. Now use this command in the OPT directory of our own Linux system. We tried to enter the command: Du. In the figure above, we use the Red line to show the size of each file and directory that occupies the hard drive. The position of the green coil is relative to the name of each file and directory. And the position of the blue circle is the order of the current eye ...

A year later, in 1991, Rivest developed a more technologically sophisticated MD5 algorithm. It adds the concept of "security-straps" (safety-belts) on the basis of MD4. Although MD5 is slightly slower than MD4, it is safer. This algorithm is clearly composed of four and MD4 designs with a few different steps. In the MD5 algorithm, the size of the information-digest and the necessary conditions for filling are identical to the MD4. Den Boer and Bosselaers have discovered the MD5 algorithm in the fake ...

Of the many methods that can be applied to http://www.aliyun.com/zixun/aggregation/13835.html ">ubuntu security", one is called File Integrity Monitoring (file integrity checking). The purpose of integrity monitoring and verification of critical system binaries and profiles is to ensure that these key files are not made unauthorized changes. Unauthorized changes to system-specific files are one of the manifestations of attack and endangerment activities on the system. File integrity monitoring is a kind of ...

Samhain is a daemon. It is primarily used to check file integrity, search for suid executables, and detect kernel module http://www.aliyun.com/zixun/aggregation/16938.html ">rootkit (Linux only)." It can be used to centrally monitor the options for stand-alone or as a client/server system, strong (192-bit AES) for encrypting client/server connections and storing databases and configuration files on the server. It supports ...