Unix/Linux命令行小技巧（8）- 只查看今天的日志

使用“grep "$(date +%b\ %e)" /var/log/syslog”命令只查看今天的日志信息：
举个例子：

-bash-3.2$ grep "$(date +%b\ %e)" /var/log/syslog
Jan 12 00:10:18 PONTUS sendmail[5727]: [ID 801593 mail.info] t0BNA1Lo005727: from=sa@xx.com, size=176, class=
0, nrcpts=1, msgid=<201501112310.t0BNA1Lo005727@PONTUS.xx.net>, relay=root@localhost
Jan 12 00:10:34 PONTUS sendmail[5914]: [ID 801593 mail.info] t0BNA1Lo005727: to=cc@xx.net, delay=00:00:33, xd
elay=00:00:16, mailer=relay, pri=120176, relay=mailhost.xx.net. [10.10.8.90], dsn=2.0.0, stat=Sent (t0BNAWRn0
00026 Message accepted for delivery)

技巧出处：https://twitter.com/nixcraft/status/231473119817261056。