Linux Software Installation and uninstall __linux

The installation and uninstallation of Linux software has been a challenge for many new users. In Windows, we can use the security loading program that comes with the software or Add/Remove Programs in Control Panel. Similar to Linux, there is a powerful software loading and unloading tool called RPM. It can be used to build, install, query, update, uninstall software. The tool is used at the command line. You can get help for this command by entering RPM after the shell's prompt.

installation of software
There are two different forms of software installation under Linux. The first installation file name is xxx.tar.gz; another installation file name is xxx.i386.rpm. Software distributed in the first way is mostly sent in the form of source code, and the second is sent directly in binary form.

For the first, the installation steps are as follows: 1. First, copy the installation files to your directory. For example, if you are logged on as root, copy the software to/root.
#cp Xxx.tar.gz/root
2. Because the file is compressed and packaged, it should be decompressed. The command is:
#tar Xvzf filename.tar.gz If it is filename.tar.bz2 format, it should be tar jxvf filename.tar.bz2 to extract
3. After executing the command, the installation file is extracted in the current directory by path. Use the LS command to see the uncompressed file. Usually in the resulting file after the decompression, there are "Install" files. This file is a plain text file, detailing how the package is installed.
4. Perform a decompression of the resulting executable script named configure. It is the system information required for installation to check whether the system has the necessary libraries to compile, and whether the version of the library meets the needs of the compilation. Prepare for the subsequent compilation work. Command is: #./configure
If you want to install the software to a specified directory, you should use #./configure--prefix=/your own directory, such as I want to install a mlterm into the/opt/mlterm directory, should be entered as follows
#./configure--prefix=/opt/mlterm
5. After the check is passed, the makefile file for compilation is generated. At this point, you are ready to start compiling. The process of compiling depends on the size of the software and the performance of the computer, and the time spent is different. The command is: #make.
6. After successful compilation, type the following command to start the installation:
#make install, sometimes you can enter #make && make install for convenience.
7. Installation completed, should clear the compilation process generated during the temporary files and configuration process generated files. Type the following command: #make clean #make Distclean This is the end of the installation of the software.

For the second, the installation steps are much simpler. As in the first approach, copy the installation files to your directory. Then use RPM to install the file. Commands are as follows: #rpm-I filename.i386.rpm
RPM will automatically unpack the installation files and install the software to the default directory. and register the software installation information into the RPM database. The function of the parameter i is to get the RPM into installation mode.


Uninstall of software
1. Software uninstall is mainly done using RPM. The uninstall software first needs to know the name that the package registers in the system. Type the command:
#rpm-Q-A
You can query all the packages that are installed in the current system.
2. Determine the name of the software to uninstall, you can start to actually uninstall the software. Type the command:
#rpm-E [package name]
You can uninstall the software. The function of the parameter e is to get the RPM into uninstall mode. Uninstall the package named [Package name]. There is a dependency between each package in the system. If you cannot uninstall because of dependencies, RPM prompts and stops uninstalling. You can use the following commands to ignore dependencies and start uninstalling directly:
#rpm-E [package name]-nodeps
Ignoring the uninstall of dependencies may cause some other software in the system to be unusable
If you want to know where the RPM package is installed?
should use #rpm-QL [package name]
3. How to uninstall the software installed with the source package?
It is best to look at the Readme and install, the general case has said, but most software does not provide the source code package uninstall method, we can find the software installation point Delete. It depends on where you installed it. For example, if you install the software, specify a directory. This problem is not difficult;
such as using the source package to install Gaim
#./configure--prefix=/opt/gaim
#make && make Install
If you install Mlterm
#./configure--prefix=/opt/mlterm
#make && make Install
The software that installs the source package, all specifies installs in the/OPT directory, this is very easy to find. If deleted, the corresponding software directory is deleted. Some software is to perform make uninstall in the decompression installation directory, so it is unloaded.