linux命令排查日志

最近做了火币网的websocket 币种行情记录，并做了重连日志。下面记录一下，排查日志的操作步骤:

1. 查看重连日志

cat test.json
结果:

{"time": 1617217365, "msg": "断线重连", "count": 1}
{"time": 1617225128, "msg": "断线重连", "count": 1}
{"time": 1617228095, "msg": "断线重连", "count": 1}

2. 查看币种日志

grep "1617217364" xrpusdt.json -n
结果:

	41224:{"time": 1617217364520, "price": 0.55343}

备注: 一开始日志时间如果查不到，就查查附近的秒数有没有，减少1秒，就查到了
41224 就是行数

3. 查看排查到的行数的附近日志:

tail -n +41220 xrpusdt.json |head -n 10

	{"time": 1617217360525, "price": 0.55342}
	{"time": 1617217361533, "price": 0.55342}
	{"time": 1617217362566, "price": 0.55348}
	{"time": 1617217363574, "price": 0.55344}
	{"time": 1617217364520, "price": 0.55343}
	{"time": 1617217368519, "price": 0.55338}
	{"time": 1617217369531, "price": 0.55331}
	{"time": 1617217370568, "price": 0.55333}
	{"time": 1617217371575, "price": 0.55336}
	{"time": 1617217372616, "price": 0.55336}

备注： 利用tail、head 命令 ，就能显示日志指定行数的前后内容了。

4. 或者可以使用 sed 命令

sed -n "41220,41228p" xrpusdt.json

	{"time": 1617217360525, "price": 0.55342}
	{"time": 1617217361533, "price": 0.55342}
	{"time": 1617217362566, "price": 0.55348}
	{"time": 1617217363574, "price": 0.55344}
	{"time": 1617217364520, "price": 0.55343}
	{"time": 1617217368519, "price": 0.55338}
	{"time": 1617217369531, "price": 0.55331}
	{"time": 1617217370568, "price": 0.55333}
	{"time": 1617217371575, "price": 0.55336}

好了，笔记记录完毕，以后类似的查找关键字日志及其前后日志都可以按照此步骤排查。

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