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Commands
Get NIC/IP Wiredifconfig en0 Wi-Fiifconfig en1 en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMP...
Install Java8 on macOS
Oracle 1.8 is only support x86. Azul Zulu JDK 8 brew install --cask zulu@8 java -versionopenjdk...
Datasource Error
Errors 根据时间排查错误日志docker logs grafana | grep '2025-08-28T05:22:' Grafana 原始日志logger=datasources...
tcpdump
Specify Port & Flags tcpdump -i lo -nn -s 0 tcp port 9004 and '(tcp[tcpflags] & (tcp-syn|tcp-rst...
Commands
ss summary ss -s Total: 1785 TCP: 2635 (estab 1564, closed 1026, orphaned 23, timewait 1013) ...
Traffic Stats
iftop apt-get update apt-get install iftop iftop -i eth1 -P tcpdump BytesMBtcpdump -i eth1 -n...
Check Command Exists
if which iptables-save >/dev/null 2>&1; then echo "exists" else echo "empty" fi
Check File Exists
FILE="/etc/iptables/rules.v4" if [ -f "$FILE" ]; then echo "$FILE exists" else echo "$F...
Beep Code
服务器发出蜂鸣声（beep/buzzer）通常是在 硬件或系统发现异常时发出的报警声，具体原因需要结合 蜂鸣声的长短、次数、频率 来分析。我们可以系统化地排查： 背景 TU229V2 服务器长...
Architecture
JRE vs JVM ┌──────────────────────────┐ │ 物理服务器 │ │ │ │...