161602104陈后全

161602104陈后全

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+
+Exercises1
+1. Create a new directory called workbench in your home directory.
+Solution:
+    mkdir /home/workbench
+
+2. Without changing directories create a file called readme.txt inside of workbench.
+Solution:
+		touch /home/workbench/readme.txt
+
+3. Append the numbers 1, 2, and 3 to readme.txt so that each number appears on it’s own line.
+Solution:
+		echo -e “1\n2\n3”>/home/workbench/readme.txt
+
+4. Print readme.txt to the command line.
+Solution:
+		cat /home/workbench/readme.txt
+
+5. Use output redirection to create a new file in the workbench directory called list.txt which lists the files and folders in your home directory.
+Solution:
+		ls 1>/home/workbench/list.txt
+
+6. Find out how many characters are in list.txt without opening the file or printing it to the command line.
+Solution:
+		wc -m < /home/workbench/list.txt
+
+
+Exercises2
+1. Create a file called message.txt in your home directory and move it into another directory.
+Solution:
+	touch /home/message.txt
+	mv message.txt /home/workbench/
+
+2. Copy the message.txt you just moved into your home directory.
+Solution:
+		cp /home/workbench/message.txt /home
+
+3. Delete both copies of message.txt. Try to do this without using rm.
+Solution:
+		find /home -name “message.txt” -delete
+
+
+
+Exercises3
+1. Use man to look up the flag for human-readable output from ls.
+Solution:
+		man ls
+		ls -h
+
+2. Get help with man by typing man man into the console.
+Solution:
+		man man 
+
+3. Wouldn’t it be nice if there was a calendar command? Use apropos to look for such a command, then use man to read about how that command works.
+Solution:
+		apropos calendar
+		man cal
+
+Exercises 4
+4. Before I organized the photos by year, what command would have listed all of the photos of type .png?
+Solution:
+		find -name "*.png"
+
+5. Before I organized the photos by year, what command would have deleted all of my hiking photos?
+Solution:
+		find -name “*hiking*” -delete
+
+6. What series of commands would you use in order to put my figures for a data science course and the pictures I took in the lab into their own folders?
+Solution:
+		  mkdir “Figures For Data Science”
+		  mkdir “Pictures Took In Lab”
+    	find -name “*Data*Science*” -exec mv ‘{}’ “Figures For Data Science” \;
+    	find -name “*figure*lab*” -exec mv ‘{}’ “Pictures Took In Lab” \;