010-160: LPI Linux Essentials Exam Study Guide with Complete Solutions

010-160: LPI Linux Essentials Exam Study Guide with Complete Solutions whereis - Answer-used to search for programs in restricted locations, such as binary file directories, libraries, and man directories. locate - Answer-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 - Answer-Updates the system managed database of filenames Displays current working directory - Answer-pwd Change into the current user's home directory - Answer-cd ~ cd $HOME Both of these do what Change to the parent directory of the current directory - Answer-cd .. Change to the etc directory in the root (/) directory - Answer-cd /etc Creates a hard link named '' for the file '' - Answer-ln Creates a symbolic link named of - Answer-ln -s EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISH SEPTEMBER 2024 2/9 touch - Answer-Can be used to update the timestamp of a file or if that file doesn't exist it will create a blank file with the specified name. Will update the timestamp of the specified file if it exists. If it does not exist it will not create a blank file. - Answer-touch -c Adds the content "Hey there!" to the specified file. - Answer-echo "Hey there!" cat - Answer-Displays the contents of a file Opens the vi editor for the file "sample". This will allow you to write text into a file. - Answer-vi sample Will display the "sample" file's byte count - Answer-wc -c sample Displays the number of characters in the "sample" file - Answer-wc -m sample Display the number of lines in the "sample" file - Answer-wc -l sample Display the word count of the "sample" file - Answer-wc -w sample Extracts the first field of the "/etc/passwd" file - Answer-cut -f 1 /etc/passwd Extract the first three characters from the "/etc/passwd" file - Answer-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. - Answer-cut -d ":" -f 3 /etc/shadow Search for all the rows containing the string "/home" in the "/etc/passwd" file - Answer-grep /home /etc/passwd EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISH SEPTEMBER 2024 3/9 Display the number of lines containing the string "/bin" in the "/etc/passwd" file - Answer-grep -c /bin /etc/passwd Display the details of the root user from the /etc/shadow file - Answer-grep root /etc/shadow Search the /etc directory recursively for the string "wlan" - Answer-grep -r wlan /etc Find all the files in the /etc directory having names that start with pass - Answer- find /etc -name pass* List the files in the /etc directory with extensions conf (limit the search to one level) - Answer-find /etc -maxdepth 1 -name *.conf List all the files on system with the permission set 640 (limit the search to two levels) - Answer-find / -maxdepth 2 -perm 640 List the files in the var/cache directory owned by the root user (limit the search to two levels) - Answer-find /var/cache -maxdepth 2 -user root find /var/cache -maxdepth 2 -uid 0 List all the files in the /root directory that belong to the root group (do not