Detailed explanation of rpm command parameters in linux

In the Linux operating system, there is a system software package, its function is similar to the "Add / Remove Programs" inside Windows, but the function is much better than "add / delete the program", it is Red Hat Package Manager (refer to RPM) . This kit is first introduced by Red Hat, later by other Linux developers. Since it saves Linux users a lot of time, it is widely used in Linux installed and deleted software. Let's introduce you to its specific use. 1. We get a new software. Before installation, we must first check what you have in this package. Suppose this file is: Linux-1.4-6.i368.rpm, we can use this command to view: rpm -qpi Linux-1.4-6.i368.rpm system will list detailed information of this package, including how many files, file names, file size, creating time, compilation date, etc. 2. All files listed above is not necessarily installed at the time of installation, just like the installation method of Windows is divided into typical, complete, custom, Linux will make you choose to install, at this time we can use this below The item will check which parts will be installed in the system to facilitate our choice: rpm -qpl Linux-1.4-6.i368.rpm 3. After selecting the installation method, start installing. We can install this software with rpm-ivh linux-1.4-6.i368.rpm command. During the installation process, if the system prompts this software installed or cannot continue to be installed because of other reasons, if we do want to perform the installation command, you can add a parameter "-replacepkgs": rpm -ivh -replacepkgs Linux 1.4-6.i368.rpm 4. Sometimes we uninstall a installed software, just execute the RPM-E command. 5. Upgrading the low version software is a good way to improve its function, so that we can save the trouble of installing new software after uninstalling, to upgrade a software, you only need to execute the following command: rpm -UVH , Note: The file name at this time must be an upgrade patch to upgrade software 6. Another method of installing software can be embodied in Linux, and a performance of RMP powerful features: Direct online installation software through the FTP site. When you find the site that you need, you can implement the following command, you can implement online installation, such as online installation Linux-1.4-6.i368.rpm, you can use the command: rpm -i ftp: // ftp.pht.com/pub/linux/redhat/...-1.4-6.i368.rpm 7. In our use of the computer, it will inevitably incorrectly, if we accidentally delete several files and affect the system When the performance is found, how do you find a few files? RPM package provides a function of finding corrupted files, perform this command: rpm -va, Linux will list all corrupted files. You can fix it via Linux installation CD. 8. Lonux system, in the process of use, it is inevitable that we don't know, in Windows, we can quickly determine which folder belongs to a file in Linux in Linux, below This command line can help us quickly determine which package belongs to which package belongs to: rpm -qf 9. After each package is installed in the Linux system, the installation file will "report" in the RPM database, so, When we are querying the properties of an installed software, we need to find it in this database.