Simple System File verification in Linux

Article Title: a simple system file verification method in Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories, write a simple script, and regularly perform integrity verification for specific system files, use the md5sum tool in Linux to verify the MD5 of files in a specific directory.
　
#! /Bin/bash
　
# Write By LouLanCN@163.com
　
Md5sum = "/usr/bin/md5sum"
　
Md5f = SysCheck-'date + % F'. md5
　
Fs = "/etc/sysconfig/bin/sbin/usr/bin/usr/sbin"
　
For d in $ fs
　
Do
　
For f in 'ls $ d'
　
Do
　
$ Md5sum $ d/$ f >>$ md5f
　
Done
　
Done
　
Here are several notes:
　
1. The md5sum file must be backed up in another safe place in advance
　
2. For the generated md5f (such as SysCheck-2008-01-27.md5) file, it must also be stored in another safe place, during verification and then downloaded to the local use
　
[Root @ lapp ~] #./M5-c SysCheck-2008-01-27.md5 | more
　
/Etc/adjtime: OK
　
/Etc/aliases: OK
　
/Etc/aliases. db: OK
　
/Etc/anacrontab: OK
　
/Etc/at. deny: OK
　
/Etc/auditd. conf: OK
　
/Etc/audit. rules: OK
　
/Etc/auto. master: OK
　
/Etc/auto. misc: OK
　
/Etc/auto.net: OK
　
/Etc/bashrc: OK
　
/Etc/bg5ps. conf: OK
　
/Etc/bg5ps. conf. zh_CN: OK
　
/Etc/bg5ps. conf. zh_CN.GB2312: OK
　
/Etc/bg5ps. conf. zh_TW: OK
　
/Etc/bg5ps. conf. zh_TW.Big5: OK
　
Here is just an idea. There are many tools for system integrity verification, which can be used flexibly.