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53 Cards in this Set
- Front
- Back
What vi command moves to the beginning of the next word?
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e
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How does Linux indicate the end of a line?
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line feed
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What option runs vi in binary mode?
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-b
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What command will reveal the purpose of a file?
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man -f filename
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Why do text files copied from Windows to Linux not work as scripts?
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Linux and Windows indicate line ends in different ways?
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How does Windows indicate a line return?
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carriage feed, line return
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How is a carriage return indicated?
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^M
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What command will search man pages for a keyword?
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man -k keyword
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What command will search man pages for a keyword?
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man -k keyword
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What command will search man pages for a keyword?
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man -k keyword
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In what three directories are most commands stored?
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/bin, /usr/bin, and /usr/local/bin
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What command will remove duplicate lines from a file?
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uniq
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What command will remove duplicate lines from a file?
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uniq
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What is process status R?
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runnable (in run queue)
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What command will tell you where another command is located?
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which
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Why are shell commands faster than other commands?
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a new process does not have to be created
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What command will list currently-running processes?
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ps
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What key combination is used to suspend a process?
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CTRL-Z
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What is process status D?
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uninterruptible sleep (usually IO)
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What is process status S?
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sleeping
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What is process status T?
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traced or stopped
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What is process status Z?
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defunct ("zombie") process
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What is the difference between kill and kill -9?
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kill allows the program to shut itself down
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What is the difference between kill and kill -9?
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kill allows the program to shut itself down
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What does a "sticky bit" on a directory do?
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Restricts who can delete or rename a file in that directory
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What character represents a "sticky bit"?
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t
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What character represents a "sticky bit"?
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t
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What three entities can delete/rename a file when the "sticky bit" is set on the directory?
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the owner of the directory, the owner of the file, or the superuser
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What three entities can delete/rename a file when the "sticky bit" is set on the directory?
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the owner of the directory, the owner of the file, or the superuser
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What command displays password aging information?
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chage
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What command will force a password change every x days with y days warning?
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chage -M x -W y user
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What command can be used to check library dependencies?
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ldd
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What utility is used to write messages to the system file?
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logger
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In the absence of either an at.allow or at.deny file, which users are allowed to create jobs to run at different times?
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only superusers
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Where are at.allow files stored?
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/etc
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By default, who can read entries in the messages file?
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only superusers
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What filesystem is used for CD-ROMs?
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iso9660
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Is the swap filesystem mountable?
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no
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What can be done if the root password is forgotten?
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reboot into runlevel 1 and use "init=/bin/sh" as a boot option
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What is the newgrp command used for?
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changing a user's primary group
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What pseudodirectory provides information about hardware devices?
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/proc
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Where are default settings for new users copied from?
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/etc/skel
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What are inodes?
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file pointers
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What command will show inode usage?
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df -i
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What command will show free space in kilobytes?
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df -k
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Can a disk become full even if it still has free space?
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yes, if all inodes are used
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What file contains information about IRQs?
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/proc/interrupts
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What command will return a list of active network controllers?
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ifconfig
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What character is used to separate commands?
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;
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What character is used to tell a command to run in the background?
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&
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What command is used to run a command a single time only?
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at
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Where is most locally-added software stored?
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/usr/local
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In vi, what does : do?
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allows ex commands
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