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39 Cards in this Set
- Front
- Back
What command is used to change permissions?
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chmod
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What command will show all the jobs in a print queue?
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lpq
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What command will remove a jobid from a print queue?
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lprm <jobid>
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What command is used to control a print queue (reset spooler, etc.)?
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lpc
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What security risk does Telnet pose?
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password is sent in cleartext
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Logins from the console on a non-X environment are supported by what program in Linux?
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getty
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How is a locked terminal closed?
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by switching to another virtual terminal and killing the locked terminal
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How is a locked terminal closed?
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by switching to another virtual terminal and killing the locked terminal
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What two methods can be used to uninstall LILO?
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restore the original boot sector with dd; or use a DOS disk to run fdisk /mbr
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How does Linux mark shadow passwords?
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with an 'x' in the second field of every line in the passwd file
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What does the 'P' command in Fdisk do?
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prints the current partition table
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What does the 'N' command in Fdisk do?
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creates a new partition
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What does the 'w' command in Fdisk do?
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writes work to disk (removes existing partitions)
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What does the 't' command in Fdisk do?
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changes the partition type
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What is partition type 82?
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swap partition
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What is partition type 83?
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regular filesystems
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What does the 'd' command in Fdisk do?
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deletes a partition
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What has to be done after a partition is created?
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it must be formatted with mkfs
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What should be done before running fsck on an active filesystem?
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unmount the partition
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What command is used to unmount a drive?
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umount
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What program can be used to schedule commands?
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cron
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What daemon handles scheduling?
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crond
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What format does crontab use to set date and time?
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6 columns: minute hour day month weekday command
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What line will cause the output of a cron job to go to someone other than the owner of the crontab?
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MAILTO=<username>
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What command can be used to determine what program created a core dump?
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file
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What is a PID?
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process identifer
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What is a PPID?
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parent process ID
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What is the parent of all processes? What is its PID?
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init; PID=1
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What command can be used to list processes?
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ps
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What command can be used to list processes?
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ps
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When a program crashes, what is usually left behind?
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a core dump
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What command can be used if a normal "kill" command is ineffective?
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kill -9
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Where are general system messages stored?
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/var/log/messages
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Where are mail transfer messages stored?
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/var/log/maillog
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Where are mail transfer messages stored?
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/var/log/maillog
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Where are security-related messages stored?
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/var/log/secure
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Where are status reports from the cron daemon stored?
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/var/log/cron
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What two files are historical data about logins stored in?
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/var/log/lastlog and /var/log/wtmp
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What two methods can be used to create backups?
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tarball and dump/restore
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