> For the complete documentation index, see [llms.txt](https://krjaeh0.gitbook.io/j-log/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://krjaeh0.gitbook.io/j-log/network/tools-and-operations/servercheckscript.md). # ServerCheckScript ### 출력 사항 * 시스템 정보: 서버 운영체제, DB 버전, 현재 시간 * 시스템 리소스: CPU, RAM, ROM 사용량 * 파일 시스템 사용량 * 디스크 컨디션: [smart tool](file:///2435498/dev_tools/smart%20tool.md)을 통한 디스크 상태 확인 * 부팅 정보: 시스템 부팅 시간, 운영 시간 * 현재 로그인한 사용자 목록 * 현재 실행 중인 프로세스: 웹, DB, 애플리케이션 등 실행 여부 *** ### 시스템 정보 * 운영체제: \~ -relese *** ### 시스템 리소스 명령 예시: * free : 메모리 사용량 * free -h : 메모리 사용량 단위 포함 * [sysstat](file:///2435498/linux_admin/sysstat.md) * [cron](file:///2435498/linux_admin/cron.md): `crontab -e * 5 * * 0 root /usr/lib/sa/sal` *** ### 파일 시스템 명령 예시: * df -h * du *** ### 디스크 컨디션 * [smart tool](file:///2435498/dev_tools/smart%20tool.md) *** ### 부팅 정보 * who -b *** ### 현재 로그인한 사용자 * who -u *** ### 프로세스 정보 명령 예시: * ps -ef * pgrep * [netstat](broken://pages/64ec2824dea3af55128da0d6f6a95deca09d48e6) *** ### 작성 예제 스크립트 예제: {% code title="server.sh" %} ```bash #!/usr/bin/bash #Functions get_cpu_stat() { sar 1 3 | grep Average | awk '{for(i=3;i<=NF;i++) printf $i" "}' } get_ram_stat() { free -h | grep Mem | awk '{for(i=2;i<=NF;i++) printf $i" "}' } get_swap_stat() { free -h | grep Swap | awk '{for(i=2;i<=NF;i++) printf $i" "}' } # system os_ver=`grep . /etc/*rocky-release | perl -ane print` # os check # DB check cur_time=`date` # date check cpu_stat=$(get_cpu_stat) ram_stat=$(get_ram_stat) swap_stat=$(get_swap_stat) echo echo "[Server Monitor]" echo "--------------------------------------------------------" echo "OS Version: $os_ver" echo "DB Version: MariaDB ~~" echo "Current Time: $cur_time" echo # resource Monitor echo "[Resource]" echo "--------------------------------------------------------" echo "CPU: $cpu_stat" echo "RAM: $ram_stat" echo "SWAP: $swap_stat" echo # File echo "[File]" echo "--------------------------------------------------------" df -h echo # Disk echo "[Disk]" echo "--------------------------------------------------------" smartctl --all /dev/sda echo # Boot echo "[Boot]" echo "--------------------------------------------------------" who -b echo # User echo "[Users]" echo "--------------------------------------------------------" who -u echo # Process echo "[Process]" echo "--------------------------------------------------------" netstat -p echo ``` {% endcode %} 실행 예시 출력: {% code title="실행 결과 예시" %} ```bash ./server.sh [Server Monitor] -------------------------------------------------------- OS Version: Rocky Linux release 9.4 (Blue Onyx) DB Version: MariaDB ~~ Current Time: Tue Sep 24 11:24:40 AM KST 2024 [Resource] -------------------------------------------------------- CPU: all 0.00 0.00 0.67 0.00 0.00 99.33 RAM: 1.7Gi 321Mi 1.2Gi 4.0Mi 397Mi 1.4Gi SWAP: 2.0Gi 0B 2.0Gi [File] -------------------------------------------------------- Filesystem Size Used Avail Use% Mounted on devtmpfs 4.0M 0 4.0M 0% /dev tmpfs 888M 0 888M 0% /dev/shm tmpfs 356M 5.0M 351M 2% /run /dev/mapper/rl-root 17G 2.1G 15G 13% / /dev/sda1 960M 404M 557M 43% /boot tmpfs 178M 0 178M 0% /run/user/0 [Disk] -------------------------------------------------------- smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.14.0-427.33.1.el9_4.x86_64] (local build) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Device Model: VBOX HARDDISK Serial Number: VB911d6255-dc004aed Firmware Version: 1.0 User Capacity: 21,474,836,480 bytes [21.4 GB] Sector Size: 512 bytes logical/physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ATA/ATAPI-6 published, ANSI INCITS 361-2002 Local Time is: Tue Sep 24 11:24:43 2024 KST SMART support is: Unavailable - device lacks SMART capability. A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. [Boot] -------------------------------------------------------- system boot 2024-09-24 08:47 [Users] -------------------------------------------------------- root pts/0 2024-09-24 08:50 . 1382 (192.168.1.8) root pts/1 2024-09-24 11:15 00:09 2296 (192.168.1.8) ``` {% endcode %} *** ### 팀 과제 * 리눅스 시스템 보안 점검 스크립트 작성 (하나의 파일) 현재 포함된(원본) 스크립트 조각: {% code title="팀 과제 - 원본 스크립트 조각" %} ```bash telnetstat=telnet.socket if [ $telnetstat = 'active' ]; then echo "취약 - telnet 서비스 동작 중 -> 서비스 제거 여부 점검" else sshstat=cat /etc/ssh/sshd_config | grep PermitRootLogin if [ $sshstat = 'no']; then echo "취약 = root 원격 접속 가능" ``` {% endcode %} 요구사항: * 현재 버전에 맞게 수정해서 * 포맷 통일 * 금요일까지 (위 요구사항은 원문 그대로 유지되었습니다.) *** --- # Agent Instructions This documentation is published with GitBook. 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