安裝方式：https://lnav.org/downloads
lnav 文字檔、log檔案檢視工具，以 C++ 所設計的 open source 工具
最大特色是可辨識不同的軟體的 log 檔格式，畫面上以格式化方式顯示，並且可以上、下翻頁捲動來瀏覽
搭配 SQL 語法 可以快速過濾出指定的資料。
不用急著安裝，官方有提供試用功能
輸入：
盒子小站# ssh [email protected]
or
# ssh [email protected]在使用 cat、more、tail或less 查看各軟體的 log 檔案時
會因為換行的關係，造成資料不易閱讀：
改用 lnav 時：
# lnav access_log
可按 PageUp、PageDown、方向鍵來瀏覽資料
lnav 最方便的是
例如：
找出 時間是 「2024/8/28 17:01:30 ~ 2024/8/28 17:02:00」 的 requests
命令是：
;SELECt * from access_log where log_time>='2024-08-28 17:01:30' AND log_time<='2024-08-28 17:02:00'
找出 referer 網址有「wp-admin」，「method=POST」相關的 requests
命令是：
;select * from access_log where cs_referer like '%wp-admin%' AND cs_method='POST'
https://docs.lnav.org/en/v0.12.0/formats.html#log-formats
Name |
Table Name |
Description |
|---|---|---|
Common Access Log |
access_log |
The default web access log format for servers like Apache. |
Amazon ALB log |
alb_log |
Log format for Amazon Application Load Balancers |
Generic Block |
block_log |
A generic format for logs, like cron, that have a date at the start of a block. |
Bunyan log |
bunyan_log |
Bunyan JSON logging library for node.js |
Candlepin log format |
candlepin_log |
Log format used by Candlepin registration system |
Yum choose_repo Log |
choose_repo_log |
The log format for the yum choose_repo tool. |
Cloudflare Access Log |
cloudflare_json_log |
Cloudflare Enterprise detailed logs of metadata |
CloudVM Ram Log |
cloudvm_ram_log |
Periodic dumps of ram sizes |
CUPS log format |
cups_log |
Log format used by the Common Unix Printing System |
Dpkg Log |
dpkg_log |
The debian dpkg log. |
Amazon ELB log |
elb_log |
Log format for Amazon Elastic Load Balancers |
engine log |
engine_log |
The log format for the engine.log files from RHEV/oVirt |
Common Error Log |
error_log |
The default web error log format for servers like Apache. |
ESXi Syslog |
esx_syslog_log |
Format specific to the ESXi syslog |
Fsck_hfs Log |
fsck_hfs_log |
Log for the fsck_hfs tool on Mac OS X. |
GitHub Events Log |
github_events_log |
Format for the public GitHub timeline from gharchive.org |
Glog |
glog_log |
The google glog format. |
HAProxy HTTP Log Format |
haproxy_log |
The HAProxy log format |
Java log format |
java_log |
Log format used by log4j and output by most java programs |
journalctl JSON log format |
journald_json_log |
Logger format as created by systemd journalctl -o json |
Katello log format |
katello_log |
Log format used by katello and foreman as used in Satellite 6. |
Nextcloud server logs |
nextcloud |
Nextcloud JSON server logs audit.log, flow.log, and nextcloud.log |
OpenAM Log |
openam_log |
The OpenAM identity provider. |
OpenAM Debug Log |
openamdb_log |
Debug logs for the OpenAM identity provider. |
OpenStack log format |
openstack_log |
The log format for the OpenStack log files |
CUPS Page Log |
page_log |
The CUPS server log of printed pages. |
Papertrail Service |
papertrail_log |
Log format for the papertrail log management service |
Packet Capture |
pcap_log |
Internal format for pcap files |
Process State |
procstate_log |
Periodic dumps of process state |
Redis |
redis_log |
The Redis database |
S3 Access Log |
s3_log |
S3 server access log format |
SnapLogic Server Log |
snaplogic_log |
The SnapLogic server log format. |
SSSD log format |
sssd_log |
Log format used by the System Security Services Daemon |
Strace |
strace_log |
The strace output format. |
sudo |
sudo_log |
The sudo privilege management tool. |
Syslog |
syslog_log |
The system logger format found on most posix systems. |
TCF Log |
tcf_log |
Target Communication Framework log |
TCSH History |
tcsh_history |
The tcsh history file format. |
UniFi iptables log |
unifi_iptables_log |
The UniFi gateway iptables logger format (for /var/log/iptables). |
UniFi log |
unifi_log |
The UniFi gateway messages logger format (for /var/log/messages). |
Uwsgi Log |
uwsgi_log |
The uwsgi log format. |
Vdsm Logs |
vdsm_log |
Vdsm log format |
VMKernel Logs |
vmk_log |
The VMKernel’s log format |
VMware Logs |
vmw_log |
One of the log formats used in VMware’s ESXi and vCenter software. |
VMware vSphere log format |
vmw_py_log |
The log format for some VMware vSphere services |
VMware Go Log |
vmw_vc_svc_log |
Log files for go-based logs |
VMWare PostgreSQL |
vpostgres_log |
Format for vpostgresql log files with format ‘%m %c %x %d %u %r %p %l’ |
RHN server XMLRPC log format |
xmlrpc_log |
Generated by Satellite’s XMLRPC component |
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