cron何义？（）A、用来执行排程表的程序B、用来清除快取的程序C、用来自动关机的程序D、用来清除tmp文件的程序
cron何义？（）
- A、用来执行排程表的程序
- B、用来清除快取的程序
- C、用来自动关机的程序
- D、用来清除tmp文件的程序
相关考题：
Howwouldasystemadministratorreviewroot’scurrentcronjobsofthefollowing?() A.crontab-lB.cron-lrootC.lscron-lrootD.cat/var/cron/crontabs/root
ASystempadministratorsuspectstheyarereceivinganerrorfromoneoftheirnightlycronjobs.Thejobis:01***／usr／local／bin／nightlycheck.plWhereshouldtheadministratorfirstlookforerrorsreportedbythiscronjob() A./var/log/syslog.outB.var/log/cron.logC./var/spool/cron/logsD.mail
对cron的访问控制说法正确的是（）。A、默认情况下，所有用户都能访问cronB、若需要对cron进行访问控制，可以生成/etc/cron.allow与/etc/cron.deny文件C、存在/etc/cron.allow文件时，只有cron.allow文件中允许的用户才能访问cronD、cron.allow和cron.deny同时存在时，只有cron.deny中的用户被拒绝
哪两个文件控制访问crontab命令（）A、/etc/cron/cronusersB、/var/crom/cronnousersC、/etc/cron.d/cron.allowD、/etc/cron.d/cron.deny
A small company would like help in identifying an apparent system performance problem on its internal mail server， especially to determine peak hour usage. What would be the first step in identifying the problem？（）A、 cd /var/spool/cron/crontabs，uncomment the lines in the adm file， in order to start gathering statistics.B、 cd /var/spool/cron/crontabs； uncomment the lines in the sys file， in order to start gathering statistics.C、 cd /usr/lib/cron/； vi the adm file； startsrc -s sadcD、 cd /usr/lib/cron/； vi the sys file； startsrc -s sadc
A System p administrator suspects they are receiving an error from one of their nightly cron jobs. The job is： 0 1 * * * /usr/local/bin/nightlycheck.pl Where should the administrator first look for errors reported by this cron job（）A、/var/log/syslog.outB、var/log/cron.logC、/var/spool/cron/logsD、mail
How would a system administrator review root’s current cron jobs of the following？（）A、crontab -lB、cron -l rootC、lscron -l rootD、cat /var/cron/crontabs/root
单选题A System p administrator suspects they are receiving an error from one of their nightly cron jobs. The job is： 0 1 * * * /usr/local/bin/nightlycheck.pl Where should the administrator first look for errors reported by this cron job（）A/var/log/syslog.outBvar/log/cron.logC/var/spool/cron/logsDmail
单选题How would a system administrator review root’s current cron jobs of the following？（）Acrontab -lBcron -l rootClscron -l rootDcat /var/cron/crontabs/root
多选题对cron的访问控制说法正确的是（）。A默认情况下，所有用户都能访问cronB若需要对cron进行访问控制，可以生成/etc/cron.allow与/etc/cron.deny文件C存在/etc/cron.allow文件时，只有cron.allow文件中允许的用户才能访问cronDcron.allow和cron.deny同时存在时，只有cron.deny中的用户被拒绝
问答题木材的守热性如何？在利用上有何竟义？