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前言

在测试环境下(debian7 or debian8)中，发现写好的程序中，日志打印级别为INFO的日志能打印出来，警告和错误级别打不出来。 这时，要去将源码中所有日志都改成INFO级别，那就和测试环境中的测试程序不一样了。最好是将debian的syslog日志级别全部打开。

以前也尝试配制过syslog, 没搞懂。

实验

实验步骤

• cp /etc/rsyslog.conf /etc/rsyslog.conf.bk
• modify /etc/rsyslog.conf
• service rsyslog restart

/etc/rsyslog.conf的修改

修改点

第91行，将所有日志级别都加上，就可以在/var/log/messages中看到所有syslog级别的日志了.

*.=debug;*.=info;*.=notice;*.=warn;*.=err;*.crit;*.=alert;*.=emerg;\

## Some "catch-all" log files.#*.=debug;\    auth,authpriv.none;\    news.none;mail.none -/var/log/debug*.=debug;*.=info;*.=notice;*.=warn;*.=err;*.crit;*.=alert;*.=emerg;\    auth,authpriv.none;\    cron,daemon.none;\    mail,news.none      -/var/log/messages

完整的配置文件备份

#  /etc/rsyslog.conf    Configuration file for rsyslog.##           For more information see#           /usr/share/doc/rsyslog-doc/html/rsyslog_conf.html##################### MODULES #####################$ModLoad imuxsock # provides support for local system logging$ModLoad imklog   # provides kernel logging support#$ModLoad immark  # provides --MARK-- message capability# provides UDP syslog reception#$ModLoad imudp#$UDPServerRun 514# provides TCP syslog reception#$ModLoad imtcp#$InputTCPServerRun 514############################### GLOBAL DIRECTIVES ################################# Use traditional timestamp format.# To enable high precision timestamps, comment out the following line.#$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat## Set the default permissions for all log files.#$FileOwner root$FileGroup adm$FileCreateMode 0640$DirCreateMode 0755$Umask 0022## Where to place spool and state files#$WorkDirectory /var/spool/rsyslog## Include all config files in /etc/rsyslog.d/#$IncludeConfig /etc/rsyslog.d/*.conf################### RULES ##################### First some standard log files.  Log by facility.#auth,authpriv.*         /var/log/auth.log*.*;auth,authpriv.none      -/var/log/syslog#cron.*             /var/log/cron.logdaemon.*            -/var/log/daemon.logkern.*              -/var/log/kern.loglpr.*               -/var/log/lpr.logmail.*              -/var/log/mail.loguser.*              -/var/log/user.log## Logging for the mail system.  Split it up so that# it is easy to write scripts to parse these files.#mail.info           -/var/log/mail.infomail.warn           -/var/log/mail.warnmail.err            /var/log/mail.err## Logging for INN news system.#news.crit           /var/log/news/news.critnews.err            /var/log/news/news.errnews.notice         -/var/log/news/news.notice## Some "catch-all" log files.#*.=debug;\    auth,authpriv.none;\    news.none;mail.none -/var/log/debug*.=debug;*.=info;*.=notice;*.=warn;*.=err;*.crit;*.=alert;*.=emerg;\    auth,authpriv.none;\    cron,daemon.none;\    mail,news.none      -/var/log/messages## Emergencies are sent to everybody logged in.#*.emerg             :omusrmsg:*## I like to have messages displayed on the console, but only on a virtual# console I usually leave idle.##daemon,mail.*;\#   news.=crit;news.=err;news.=notice;\#   *.=debug;*.=info;\#   *.=notice;*.=warn   /dev/tty8# The named pipe /dev/xconsole is for the `xconsole' utility.  To use it,# you must invoke `xconsole' with the `-file' option:# #    $ xconsole -file /dev/xconsole [...]## NOTE: adjust the list below, or you'll go crazy if you have a reasonably#      busy site..#daemon.*;mail.*;\    news.err;\    *.=debug;*.=info;\    *.=notice;*.=warn   |/dev/xconsole

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