40 lines
1.1 KiB
Bash
40 lines
1.1 KiB
Bash
#!/usr/bin/env bash
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# 不自动运行：线上问题的“第一分钟”快照，只读命令，不修改任何东西
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# 用法：bash diag.sh [进程名关键字] > diag-$(date +%F-%H%M).txt
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set -uo pipefail
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keyword="${1:-}"
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section() { printf '\n===== %s =====\n' "$1"; }
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section "时间和负载"
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date
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uptime
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section "CPU 占用最高的进程"
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ps -eo pid,ppid,user,%cpu,%mem,etime,cmd --sort=-%cpu | head -n 10
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section "内存"
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free -h
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section "磁盘空间和 inode"
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df -h -x tmpfs -x devtmpfs
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df -i -x tmpfs -x devtmpfs | awk 'NR == 1 || $5+0 > 80'
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section "监听端口"
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ss -lntp 2>/dev/null | head -n 30
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section "TCP 连接状态统计"
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ss -ant | awk 'NR > 1 {count[$1]++} END {for (s in count) print s, count[s]}'
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if [[ -n "$keyword" ]]; then
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section "进程：$keyword"
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pgrep -af -- "$keyword" || echo "没有找到进程"
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fi
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section "最近的内核日志（OOM 等）"
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if kernel_log="$(journalctl -k --since "1 hour ago" --no-pager 2>/dev/null)" || kernel_log="$(dmesg 2>/dev/null)"; then
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grep -iE 'oom|killed process' <<<"$kernel_log" | tail -n 20 || echo "最近没有 OOM 记录"
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else
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echo "无权限读取内核日志"
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fi
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