A small linux information collection script is mainly used for emergency response. It can be used under Debian or Centos.

Features

• CPU TOP10, memory TOP10
• CPU usage
• boot time
• Hard disk space information
• User information, passwd information
• Environmental variable detection
• Service list
• System program changes (debsums -e and rpm -va)
• Network traffic statistics
• Network connection, listening port
• Open port
• Routing table information
• Route forwarding
• ARP
• DNS Server
• SSH login information
• SSH login IP
• iptables information
• SSH key detection
• SSH burst IP
• Crontab detection
• Crontab backdoor detection
• Find common configuration files
• Find common software
• Audit history files
• Querying HOSTS files
• lsmod exception kernel module
• Anomaly file detection (nc, tunnel, proxy common hacker tools)
• Large file detection (some large files packaged)
• Free space, hard disk mount
• Open port
• LD_PRELOAD detection
• LD_LIBRARY_PATH
• ld.so.preload
• NIC promiscuous mode
• Most used software
• Change the file mtime in the last 7 days
• Change the file ctime in the last 7 days
• View SUID file
• Find: hidden files
• Find sensitive files (nc, nmap, tunnel)
• alias
• LSOF -L1
• SSHD
• Find bash bounce shell
• php webshell scan
• jsp webshell scan
• asp / aspx webshell scan
• Detection of mining process
• rkhunter scan

Usage
Networking status:

• apt-get install silversearcher-ag
• yum -y install the_silver_searcher

Offline status:

• Debian：dpkg -i silversearcher-ag_2.2.0-1+b1_amd64.deb
• Centos：rpm -ivh the_silver_searcher-2.1.0-1.el7.x86_64.rpm

git clone https://github.com/al0ne/LinuxCheck.git
chmod u+x LinuxCheck.sh
./LinuxCheck.sh
If you have installed ag and rkhunter, you can directly use the following command:
bash -c "$(curl -sSL https://raw.githubusercontent.com/al0ne/LinuxCheck/master/LinuxCheck.sh)"
The file will be saved in the format ipaddr_hostname_username_timestamp.log

References
Linenum
https://github.com/lis912/Evaluation_tools
https://ixyzero.com/blog/archives/4.html
https://github.com/T0xst/linux
https://github.com/grayddq/GScan