What file contains system-wide shell configuration parameters?
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What happens when you first add a new file to /etc/skel?
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You often mistype a certain command at the command line, and want to make sure that your typo 'autocorrects'. How would you arrange this?
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Which of the following is not a commonly-used shell configuration file?
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What does 'exec foo.sh' do?
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What will be the output of the following command?
true || echo 'hello'
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What is the correct Bash 'if' syntax?
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What will be the output of the following command?
seq 1 2 7
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What is the main Xorg configuration file?
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Which of the following is not a tool for connecting remotely to a graphical Linux desktop?
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Which command is used to set the date when a user's account will be disabled?
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Which command is used to set the date when a user's password will expire and need to be changed?
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How would you add a password to a preexisting group?
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You want to run ~/foo.sh, on the third day of every month, at 06:00am. What would you add to your crontab?
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Which is not a directory where crontab files are stored?
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What is the Systemd version of 'at'?
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How would you configure user access to cron?
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What is the nature of /etc/localtime?
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How would you convert text between character encodings?
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Which command would you use to set your system's hardware clock?
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Where are timezone files stored?
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What can be used to view Systemd log files?
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What is the purpose of logrotate?
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If you wanted to send all mail log messages to /var/log/maillog, what line would you add to /etc/rsyslog.conf?
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In what file would you configure global e-mail aliases?
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How would a non-root user configure their own e-mail forwarding?
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Which of these MTA's has a history of security problems and is generally considered outdated?
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What tool can you use to print a file from the command line?
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What is the standard port number for the SSH service?
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Which file provides a mapping between common network services and their standard port numbers?
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Which type of addressing is not supported in IPv6?
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Convert this CIDR mask into dotted decimal notation: /19
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Which statement is true regarding ICMP?
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Which modern tool would you use to configure your system's network routes?
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Which modern tool would you use to gather information about services listening on network ports?
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Which statement is true about netcat?
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Which file determines where, and in what order, programs should obtain name-service information?
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Which command line tool can be used to query DNS servers?
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If you frequently connect to an IPv6 address that does not have any DNS records, where could you add an alias for this address so you don't have to copy/paste it every time?
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What tool should be used to configure sudo?
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Which tool will not show you a list of logged-in users?
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How would you set a limit on the number of processes a specific user may run?
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What tool would you use to discover open ports on a remote system?
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Which statement is not true of the /etc/shadow file?
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What happens if the /etc/nologin file exists and is readable?
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Which of the following is not a valid SSH host key type?
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Where would you add your public SSH key to allow key logins on a remote server?
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What is the main purpose of the ~/.ssh/known_hosts file?
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What is GPG used for?
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Where does GPG store your user's keyring data?
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Which of these Linux distributions is derived from Red Hat?
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Which of the following open source applications is a desktop e-mail client?
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Debian Linux comes with which package manager built in?
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Which of the following open source packages includes a file share?
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You are releasing, as open source, a software program meant to be used over a network. What license should you use if you want to ensure that anyone who modifies and lets others use the program must also share the source?
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Which of the following is not considered a common character class for enforcing strong passwords?
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Which 'history' flag would you use to remove a single item from the shell history?
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What is the name of the predecessor to Bash?
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What happens if you unset the PATH variable in a Bash session?
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Which directory does not contain useful help information?
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Which command should you run before using 'locate' for the first time?
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You want information on the 'time()' system call, but 'man time' instead just gets you information on the shell command. How should you correct this?
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Which of the following is an absolute path?
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Where would the home directory for user 'bob' be located?
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Which combination of options to 'ls' will include a human-readable size in the output?
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Which flag to 'ls' will list hidden files?
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What happens if you run 'rmdir' on a directory that contains files?
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Which path would be listed by 'ls *.*'?
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What is the fastest way to move a large file to another location on the same filesystem?
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Which combination of options would you pass to 'tar' to create a gzipped tarball?
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Which archive format is not supported by 'tar'?
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Choose the string matched by this regular expression: ^$
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Which redirection operator would you use to send only stderr to a file, overwriting whatever is there?
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What will be the output of the following command?
echo 'foo bar baz' - grep b - sort -r
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What special variable contains the current process ID?
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What special variable contains the list of arguments passed to a script?
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What will the following shell script do?
while true; do
echo 'hello'
done
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What special variable contains the name of the current shell or script being run?
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What happens if you forget to include the shebang (#!) line in a script?
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Which exit status means that the previous command exited successfully, without error?
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