Shulou(Shulou.com)05/31 Report--

Today, I will talk to you about exploring the application patch under Linux system. Many people may not know much about it. In order to let everyone know more, Xiaobian summarized the following contents for everyone. I hope everyone can gain something according to this article.

"In the course of our work, we found that system vulnerabilities and application vulnerabilities were detected through software or hardware. A large wave of vulnerabilities hit ahead. How should we deal with these vulnerabilities? The answer: the best is to make official patches, because the official will make up for the system bugs or application software bugs solved in the development process. How to make patches? On my way, Movingout!。"

0x01: Start generating test data

#cat >>example_01 example_02 example2.patch

/* A single file uses parameters-N&u to create a patch example2.patch*/

#more example1.patch

/* View test case example1 patch pack

*+++ for new documents---for old documents

*+ indicates the data added to this row--indicates the data deleted from this row

* First @@ for start, last @@ for finish

*/

0x03: Patching options and parameters

patch[options] [source files] [patch files]

-p0: option Find destination folder from current directory

-p1: option Ignore the first level directory and start with the current directory

-E: option states that if an empty file is found, delete it.

-R: option states that the "new" file and the "old" file in the patch file are now reversed

#patch -p0 < example1.patch

/* Patch example1.patch*/

#patch -p0 < example1.patch

/* Patch package example1 in the current directory again, enter "y", and the source package will be generated. */

#cat example_01.orig

/* View source package example_01 content */

#patch -p0 < example1.patch

/* Patch package example1 in the current directory again, enter "n" twice to generate the source package. */

#cat example_01.rej

/* View old packets example_01.rej*/

#patch -RE -p0 < test1.patch

/* Remove patches and restore older versions */

#cat example_01

/* View source data */

"In short, different operating systems, patching methods are different, depending on your operating system, because different operating systems have different installation package management mechanisms, so the patching methods are different. After the patch is completed, we should constantly test the robustness and security of the system. Before patching, we must back up the data, do a good job of system snapshots and important data backups, and develop good operating habits. "

After reading the above, do you have any further understanding of how to patch applications under Linux? If you still want to know more knowledge or related content, please pay attention to the industry information channel, thank you for your support.

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