单项选择题

Whichcronentrywillrun usr local bin myscriptat0500every……

Which cron entry will run /usr/local/bin/myscript at 0500 every Saturday（）

A.5 0 * * 6 /usr/local/bin/myscript
B.6 * * 5 0 /usr/local/bin/myscript
C.0 5 * * 6 /usr/local/bin/myscript
D.0 5 6 * * /usr/local/bin/myscript

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热门试题

单项选择题A System p administrator wants to NFS mount a filesystem from server alpha to server bravo . Which of the following commands should be issued from bravo to determine which filesystems are being exported by server alpha （）

A.lsexport alpha
B.showmount -e alpha
C.exportfs -l alpha
D.mount -e nfs alpha

单项选择题A System p administrator wishes to create a template file to monitor performance. Having found a template from January， how can the administrator create a July template without destroying the original January version （）

A.vi jan.template ：%s/Jan/Jul/g ：w jul.template ：q!
B.cat jan.template sed s：Jan：Jul： > jan.template
C.vi jan.template ：1，$ replace Jan Jul [Esc] ZZ
D.vi jan.template ：w jul.template ：1，$ s/Jan/Jul/g ：q!

单项选择题A System p administrator has just installed a new technology level， but oslevel -r does not show the expected technology level. Which of the following commands would determine which filesets are downlevel（）

A.lppchk
B.instfix
C.oslevel
D.installp

单项选择题A System p administrator needs to run the annualreval.sh script， directing standard error to var log reval.err， and appending standard out to var log reval.log. How can this be accomplished （）

A.annualreval.sh 2>&1 /var/log/reval.log 2> /var/log/reval.err
B.annualreval.sh 1>/var/log/reval.log 2>/var/log/reval.err
C.annualreval.sh 2>>&1 /var/log/reval.log /var/log/reval.err
D.annualreval.sh 1>>/var/log/reval.log 2>/var/log/reval.err

单项选择题IBM hardware support has just replaced a disk， and commented that the system administrator might want to remove the DISK OPERATION ERROR from the error report. Which of the following commands is used to delete the DISK OPERATION ERROR from the following error report（） IDENTIFIER TIMESTAMP T C RESOURCE_NAME DESCRIPTION F89FB899 0616150005 P O dumpcheck The copy directory is too small. 5DFED6F1 0616075205 I O SYSPFS UNABLE TO ALLOCATE SPACE IN FILE SYSTEM AA8AB241 0615153905 T O OPERATOR OPERATOR NOTIFICATION 35BFC499 0412130605 P H hdisk6 DISK OPERATION ERROR 91FBD5DB 0525045805 P S ssa1 SOFTWARE PROGRAM ERROR 05F97A32 0525045805 P H ssa1 ADAPTER ERROR

A.errclear -k 35BFC499 0
B.errclear 35BFC499 00
C.errclear -j 35BFC499 0
D.errclear 35BFC499 0