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1.failed to open PAM security session: No such file or directory
Òì³£ÃèÊö:²é¿´/var/log/cronʱ»á·¢ÏÖÈçÏÂÒì³£ÈÕÖ¾
May 14 09:10:01 localhost crond[20319]: (CRON) /export/home/username (No such file or directory)
May 14 09:10:01 localhost crond[20319]: CRON (username) ERROR: failed to open PAM security session: No such file or directory
May 14 09:10:01 localhost crond[20319]: CRON (username) ERROR: cannot set security context
Ô­Òò:Êǽ¨Á¢Óû§Ê±,Ïë²»Éú³ÉhomeĿ¼ËùÒÔÓÃÒÔÏÂÃüÁî´´½¨Óû§
useradd -d /export/home/username username
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¾ßÌå¼û:https://bugzilla.redhat.com/show_bug.cgi?id=241877ÓÐÏà¹ØÃèÊö
½â¾ö·½Ê½:
ÐÞ¸ÄÓû§Óû§Ö÷Ŀ¼,¿ÉÓÃrootÓû§´´½¨(mkdir username),È»ºóÐÞ¸ÄËùÓÐÕß(chown username username)
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usermod [-u uid [-o]] [-g group] [-G group,...]
[-d Ö÷Ŀ¼ [-m]] [-s shell] [-c ×¢ÊÍ] [-l ÐÂÃû³Æ]
[-f ʧЧÈÕ] [-e ¹ýÆÚÈÕ] [-p ÃÜÂë] [-L|-U] Óû§Ãû
usermod  -d /export/home/username -m username
2.cronÖ¸Áî²»ÄÜ´ø»·¾³±äÁ¿
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    Èç/var/log/cronµÄÈÕÖ¾ÖÐ,¿ÉÄÜ»á³öÏÖÈçϵı¨¾¯ÐÅÏ¢ 
    Error:java: command not found
Ô­Òò:
   crontab -l
   50 5 * * *  java -jar test.jar
   ÐÂÓû§usernameÔÚÓÃcron¶¨Ê±Ö´ÐÐÃüÁîʱ¿ÉÄܲ»»á´ø²ÎÊýJAVA_HOMEµÈ²ÎÊý.
   µ«Óû§×ªµ½username,ÊÖ¶¯Ö´ÐÐÒÔÉÏÃüÁî java -jar test.jarÊÇ¿ÉÒÔͨ¹ýµÄ.
½â¾ö·½Ê½:
    crontab -l
    50 5 * * *  test.sh>test.log
    (×¢:test.sh>test.logÄ¿µÄÊǽ«½Å±¾test.shÔËÐÐʱµÄÄÚÈÝÊäÈëµ½test.logÈÕÖ¾ÖбãÒÔºó²é¿´)
    test.shµÄÄÚÈÝÈçÏÂ:
   #!/bin/bash
export JAVA_HOME=/usr/java/jdk1.6/
export  CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/td.jar:$JAVA_HOME/jre/lib/rt.jar:.
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
java -jar test.jar
ͬÉÏÁíÒ»ÖÖ½â¾ö»·¾³±äÁ¿¶ªÊ§ÎÊÌâ:µ«Óû§±ØÐëÊÇroot,ÈçҪתµ½oracleÓû§½øÐб¸·ÝµÈ²Ù×÷.
su - oracle -c Ö¸Áî½Å±¾
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