chmod +x system_info.sh
./system_info.sh > system_report.txt
system_info.sh
· 2.0 KiB · Bash
Raw
#!/bin/bash
echo "===== [ 系統基本資訊 ] ====="
echo "作業系統: $(lsb_release -d | cut -f2)"
echo "核心版本: $(uname -r)"
echo "CPU 型號: $(lscpu | grep 'Model name' | sed 's/Model name:\s*//')"
echo "CPU 核心數: $(nproc)"
echo "記憶體狀態:"
free -h
echo ""
echo "===== [ 檔案描述符資訊 ] ====="
echo "當前最大開啟檔案數: $(ulimit -n)"
echo "系統允許最大開啟檔案數: $(cat /proc/sys/fs/file-max)"
echo "當前已開啟檔案數量: $(cat /proc/sys/fs/file-nr | awk '{print $1}')"
echo ""
echo "===== [ 網路設定 ] ====="
echo "最大接受緩衝區 (rmem_max): $(sysctl -n net.core.rmem_max)"
echo "最大傳輸緩衝區 (wmem_max): $(sysctl -n net.core.wmem_max)"
echo "最大網路佇列 (netdev_max_backlog): $(sysctl -n net.core.netdev_max_backlog)"
echo "最大 socket 連線數 (somaxconn): $(sysctl -n net.core.somaxconn)"
echo ""
echo "===== [ TCP 設定 ] ====="
echo "TCP TIME_WAIT 重用: $(sysctl -n net.ipv4.tcp_tw_reuse)"
echo "TCP FIN_TIMEOUT: $(sysctl -n net.ipv4.tcp_fin_timeout)"
echo "TCP SYN 佇列長度: $(sysctl -n net.ipv4.tcp_max_syn_backlog)"
echo "TCP 快速開啟 (Fast Open): $(sysctl -n net.ipv4.tcp_fastopen)"
echo "TCP 擁塞控制演算法: $(sysctl -n net.ipv4.tcp_congestion_control)"
echo ""
echo "===== [ 連線追蹤 (Conntrack) 設定 ] ====="
echo "最大連線追蹤數: $(sysctl -n net.netfilter.nf_conntrack_max)"
echo "當前連線追蹤數: $(cat /proc/sys/net/netfilter/nf_conntrack_count)"
echo ""
echo "===== [ 當前開啟的 TCP 連線 ] ====="
echo "總 TCP 連線數: $(netstat -ant | wc -l)"
echo "TIME_WAIT 連線數: $(netstat -ant | grep TIME_WAIT | wc -l)"
echo "ESTABLISHED 連線數: $(netstat -ant | grep ESTABLISHED | wc -l)"
echo ""
echo "===== [ 目前的 sysctl 設定 ] ====="
sysctl -a | grep -E 'fs.file-max|net.core.rmem_max|net.core.wmem_max|net.core.netdev_max_backlog|net.core.somaxconn|net.ipv4.tcp_tw_reuse|net.ipv4.tcp_fin_timeout|net.ipv4.tcp_max_syn_backlog|net.ipv4.tcp_fastopen|net.ipv4.tcp_congestion_control|net.netfilter.nf_conntrack_max'
| 1 | #!/bin/bash |
| 2 | |
| 3 | echo "===== [ 系統基本資訊 ] =====" |
| 4 | echo "作業系統: $(lsb_release -d | cut -f2)" |
| 5 | echo "核心版本: $(uname -r)" |
| 6 | echo "CPU 型號: $(lscpu | grep 'Model name' | sed 's/Model name:\s*//')" |
| 7 | echo "CPU 核心數: $(nproc)" |
| 8 | echo "記憶體狀態:" |
| 9 | free -h |
| 10 | |
| 11 | echo "" |
| 12 | echo "===== [ 檔案描述符資訊 ] =====" |
| 13 | echo "當前最大開啟檔案數: $(ulimit -n)" |
| 14 | echo "系統允許最大開啟檔案數: $(cat /proc/sys/fs/file-max)" |
| 15 | echo "當前已開啟檔案數量: $(cat /proc/sys/fs/file-nr | awk '{print $1}')" |
| 16 | |
| 17 | echo "" |
| 18 | echo "===== [ 網路設定 ] =====" |
| 19 | echo "最大接受緩衝區 (rmem_max): $(sysctl -n net.core.rmem_max)" |
| 20 | echo "最大傳輸緩衝區 (wmem_max): $(sysctl -n net.core.wmem_max)" |
| 21 | echo "最大網路佇列 (netdev_max_backlog): $(sysctl -n net.core.netdev_max_backlog)" |
| 22 | echo "最大 socket 連線數 (somaxconn): $(sysctl -n net.core.somaxconn)" |
| 23 | |
| 24 | echo "" |
| 25 | echo "===== [ TCP 設定 ] =====" |
| 26 | echo "TCP TIME_WAIT 重用: $(sysctl -n net.ipv4.tcp_tw_reuse)" |
| 27 | echo "TCP FIN_TIMEOUT: $(sysctl -n net.ipv4.tcp_fin_timeout)" |
| 28 | echo "TCP SYN 佇列長度: $(sysctl -n net.ipv4.tcp_max_syn_backlog)" |
| 29 | echo "TCP 快速開啟 (Fast Open): $(sysctl -n net.ipv4.tcp_fastopen)" |
| 30 | echo "TCP 擁塞控制演算法: $(sysctl -n net.ipv4.tcp_congestion_control)" |
| 31 | |
| 32 | echo "" |
| 33 | echo "===== [ 連線追蹤 (Conntrack) 設定 ] =====" |
| 34 | echo "最大連線追蹤數: $(sysctl -n net.netfilter.nf_conntrack_max)" |
| 35 | echo "當前連線追蹤數: $(cat /proc/sys/net/netfilter/nf_conntrack_count)" |
| 36 | |
| 37 | echo "" |
| 38 | echo "===== [ 當前開啟的 TCP 連線 ] =====" |
| 39 | echo "總 TCP 連線數: $(netstat -ant | wc -l)" |
| 40 | echo "TIME_WAIT 連線數: $(netstat -ant | grep TIME_WAIT | wc -l)" |
| 41 | echo "ESTABLISHED 連線數: $(netstat -ant | grep ESTABLISHED | wc -l)" |
| 42 | |
| 43 | echo "" |
| 44 | echo "===== [ 目前的 sysctl 設定 ] =====" |
| 45 | sysctl -a | grep -E 'fs.file-max|net.core.rmem_max|net.core.wmem_max|net.core.netdev_max_backlog|net.core.somaxconn|net.ipv4.tcp_tw_reuse|net.ipv4.tcp_fin_timeout|net.ipv4.tcp_max_syn_backlog|net.ipv4.tcp_fastopen|net.ipv4.tcp_congestion_control|net.netfilter.nf_conntrack_max' |
| 46 |