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certificates/essentials/lpi_essentials_lesson_02.md
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1. There is one command in the table above that doesn’t have a man page. Which one is it and why do you think that the command doesn’t have a man page? 1. There is one command in the table above that doesn’t have a man page. Which one is it and why do you think that the command doesn’t have a man page?
1. Using the commands in the table above, create the following file tree. The names that start with a capital are Directories and the ones in lower case are files. 1. Using the commands in the table above, create the following file tree. The names that start with a capital are Directories and the ones in lower case are files.
``` ```
User User
├── Documents ├── Documents
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* docs * docs
* / * /
1. Observe the following file structure. Note: Directories end with a slash (/) when tree is invoked with the -F option. You will need elevated privileges in order to run the tree command on the root (/) directory. The following is example output and is not indicative of a full directory structure. Use it to answer the following questions: 1. Observe the following file structure. Note: Directories end with a slash (/) when tree is invoked with the -F option. You will need elevated privileges in order to run the tree command on the root (/) directory. The following is example output and is not indicative of a full directory structure. Use it to answer the following questions:
``` ```
$ sudo tree -F / $ sudo tree -F /
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12 directories, 5 files 12 directories, 5 files
``` ```
* A user enters the following commands: * A user enters the following commands:
``` ```
$ cd /etc/udev $ cd /etc/udev
$ ls -a $ ls -a
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* Your current location is /home/user/Documents/. Navigate to the directory named /etc/. * Your current location is /home/user/Documents/. Navigate to the directory named /etc/.
* Your current location is /etc/systemd/system/. Navigate to the directory named /home/user/. * Your current location is /etc/systemd/system/. Navigate to the directory named /home/user/.
1. Consider the following commands: 1. Consider the following commands:
``` ```
$ pwd $ pwd
/etc/udev/rules.d /etc/udev/rules.d
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## Explorational Exercises ## Explorational Exercises
1. Suppose a user has entered the following commands: 1. Suppose a user has entered the following commands:
``` ```
$ mkdir "this is a test" $ mkdir "this is a test"
$ ls $ ls
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## Guided Exercises ## Guided Exercises
1. Use the following file structure to answer the following three questions: 1. Use the following file structure to answer the following three questions:
``` ```
/ /
├── etc/ ├── etc/
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* What command can user enter to navigate into their Documents directory from /etc/udev? Use the shortest possible path. * What command can user enter to navigate into their Documents directory from /etc/udev? Use the shortest possible path.
* What command can user enter to navigate into michael 's Music directory? Use the shortest possible path. * What command can user enter to navigate into michael 's Music directory? Use the shortest possible path.
1. Consider the following output of ls -lh to answer the next two questions. Note that directories are indicated with a d at the beginning of the line. 1. Consider the following output of ls -lh to answer the next two questions. Note that directories are indicated with a d at the beginning of the line.
``` ```
drwxrwxrwx 5 eric eric 4.0K Apr 26 2011 China/ drwxrwxrwx 5 eric eric 4.0K Apr 26 2011 China/
-rwxrwxrwx 1 eric eric 1.5M Jul 18 2011 img_0066.jpg -rwxrwxrwx 1 eric eric 1.5M Jul 18 2011 img_0066.jpg
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## Guided Exercises ## Guided Exercises
1. Given the following, select the directories that would be created by the command mkdir -p /tmp/outfiles/text/today /tmp/infiles/text/today 1. Given the following, select the directories that would be created by the command mkdir -p /tmp/outfiles/text/today /tmp/infiles/text/today
``` ```
$ pwd $ pwd
/tmp /tmp
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1. What happens when you use mv to move a directory into itself? 1. What happens when you use mv to move a directory into itself?
1. How would you delete all files in your current directory that start with old? 1. How would you delete all files in your current directory that start with old?
1. Which of the following files would log_[a-z]\_201?\_\*\_01.txt match? 1. Which of the following files would log_[a-z]\_201?\_\*\_01.txt match?
``` ```
log\_3\_2017_Jan_01.txt log\_3\_2017_Jan_01.txt
log_+_2017_Feb_01.txt log_+_2017_Feb_01.txt