010-160: LPI Linux Essentials Questions and Answers Latest Update 100% Correct.

List the files in the var/cache directory owned by the root user (limit the search to two levels) - ️️find /var/cache -maxdepth 2 -user root find /var/cache -maxdepth 2 -uid 0 locate - ️️Searches the system managed database of filenames for files containing the specified string in the filenames. (Search is much faster than the search performed using the 'find' command) updatedb - ️️Updates the system managed database of filenames Displays current working directory - ️️pwd Change into the current user's home directory - ️️cd ~ cd $HOME Both of these do what Change to the parent directory of the current directory - ️️cd .. Change to the etc directory in the root (/) directory - ️️cd /etc Creates a hard link named '' for the file '' - ️️ln Creates a symbolic link named of - ️️ln -s Will update the timestamp of the specified file if it exists. If it does not exist it will not create a blank file. - ️️touch -c Adds the content "Hey there!" to the specified file. - ️️echo "Hey there!" cat - ️️Displays the contents of a file Opens the vi editor for the file "sample". This will allow you to write text into a file. - ️️vi sample Will display the "sample" file's byte count - ️️wc -c sampleDisplays the number of characters in the "sample" file - ️️wc -m sample Display the number of lines in the "sample" file - ️️wc -l sample whereis - ️️used to search for programs in restricted locations, such as binary file directories, libraries, and man directories. Display the word count of the "sample" file - ️️wc -w sample Extracts the first field of the "/etc/passwd" file - ️️cut -f 1 /etc/passwd Extract the first three characters from the "/etc/passwd" file - ️️cut -c 1, 2, 3 /etc/passwd Extracts the third field from the "/etc/shadow" file and uses the : seperator. Since "/etc/shadow" is a : (colon) seperated file, this command will display only the content of the third field in the file. - ️️cut -d ":" -f 3 /etc/shadow Search for all the rows containing the string "/home" in the "/etc/passwd" file - ️️grep /home /etc/passwd Display the number of lines containing the string "/bin" in the "/etc/passwd" file - ️️grep -c /bin /etc/passwd Display the details of the root user from the /etc/shadow file - ️️grep root /etc/shadow Search the /etc directory recursively for the string "wlan" - ️️grep -r wlan /etc Find all the files in the /etc directory having names that start with pass - ️️find /etc - name pass* List the files in the /etc directory with extensions conf (limit the search to one level) - ️️find /etc -maxdepth 1 -name *.conf List all the files on system with the permission set 640 (limit the search to two levels) - ️️find / -maxdepth 2 -perm 640 List all the files in the /root directory that belong to the root group (do not use shorthand for specifying the directory) - ️️find /root -group root find /root -gid 0Sort the contents of the /etc/passwd file, and display it on the stdout - ️️sort /etc/passwd Numeric sort the third field of the /etc/passwd file and display it on the stdout - ️️cut -f 3 -d ":" /etc/passwd | sort -n Redirects the output of the echo $HOME command to a file named sample, overwriting its contents - ️️echo $HOME sample Appends the output of the pwd command to the sample file - ️️pwd sample Redirects the sample file as an input to the cat command. This will display the contents of the sample file. - ️️cat sample Appends only the standard error of the pwd;ech command to the sample file. - ️️pwd;ech 2 sample Overwrites the contents of the sample file with the standard output and error of the ls ~ /test command. - ️️ls ~ /test & sample Installs the traceroute program on Debian-based systems. - ️️apt-get install traceroute Whats it do and What distro typically uses it. Upgrades the system's software - ️️apt-get update apt-get upgrade Removes the traceroute package - ️️apt-get remove traceroute View all processes currently running - ️️ps Lists all the process that are currently running and are owned by the root user - ️️ps -u root Displays a dynamically updated list of processes running on the system - ️️top Displays the system's overall memory usage - ️️free