tips fix archiving exercise errors

Author: bclaremar

docs/sessions/transfer_tips/README.md

@@ -77,10 +77,10 @@ tags:
 
     Tips
 
-    - Create 1000 files REMOTELY in a directory with name ``many_files``
+    - Be in the ``transfer`` directory (or similar) and create 3000 (empty) files REMOTELY in a directory with name ``many_files``
         - ``$ mkdir many_files``
         - ``$ cd many_files``
-        - ``$ touch my-file-{1..1000}.txt``
+        - ``$ touch my-file-{1..3000}.txt``
     - Time the download of the directory, using ``time``, and the recursive option to include the files within the directory
         - ``time scp ...``.
 
@@ -90,54 +90,64 @@ tags:
 
         - [Video for Tetralith](https://youtu.be/Q5fOpHetgcU)
 
-???- question "(Optional) Exercise 2: Download the Compressed directory"
+???- question "(Optional) Exercise 2: Test the difference between transferring one or several files (using scp)"
 
     Tips
 
-    - Archive and zip the many_files directory
-    - Time the download of the compressed directory, using ``time``.
+    - Archive the many_files directory
+        - The original directory is still there! Check!
+
+    - Time the download of the original directory, using ``time scp ...``.
+        - If ``time`` does not work, count the seconds!
+  
+    - Time the download of the compressed directory, using ``time scp ...``.
         - If ``time`` does not work, count the seconds!
 
+    - Focus on the ``user`` line, because ``real`` includes the time for establishing connection and giving the credentials!
+    - Do you spott any difference?
 
     ???- tip "Answer (Tetralith example)"
 
-        Archiving and compressions step on REMOTE
+        Archiving and step on REMOTE
 
-        - ``tar -cvzf many_files.tar.gz many_files``
+        - ``tar -cvf many_files.tar many_files``
+            - The original directory is still there! Check!
 
         LOCALLY
 
-        - ``time scp [email protected]:~/test/many_files.tar.gz .``
+        - ``time scp -r [email protected]:~/transfer/many_files .`` - note the ``-r`` for recursive and including files in the folder.
+        - ``time scp [email protected]:~/transfer/many_files.tar .``
 
         - [Video for Tetralith](https://youtu.be/UPnbnfTYHAQ)
 
 
-???- question "(Optional): Exercise 3: Test the difference between transferring one or several files"
+???- question "(Optional): Exercise 3: Test the difference between transferring one or several files (using SFTP)"
 
     Tips
 
     In an SSH session (not SFTP) with REMOTE/server
 
-    - Create 1000 files REMOTELY in a directory with name ``many_files``
-        - ``$ mkdir many_files_sftp``
+    - To not interfer with last exercise make a new folder by creating 3000 files REMOTELY in a directory with name ``many_files``
+        - ``$ mkdir many_files``
         - ``$ cd many_files_sftp``
-        - ``$ touch file_{1..1000}.txt``
+        - ``$ touch file_{1..3000}.txt``
         - Check content: ``$ ls``  for checking
         - Leave directory to be able to perform next step: ``$ cd ..``
-    - Also archive and zip the ``many_files_sftp`` folder to ``many_files_sftp.tar.qz``
+    - Also archive the ``many_files_sftp`` folder to ``many_files_sftp.tar``
+       - The original directory is still there! Check!
 
-    Establish the SFTP session (Exercise 1)
+    Establish the SFTP session (Exercise 1 in SFT session)
 
     - Download (to local) the *directory* and note the time needed
 (not shown in numbers so **count the seconds!**)
-    - Download (to local) the ``.tar.gz`` file and note the time needed
+    - Download (to local) the ``.tar`` file and note the time needed
     - Was there a significant difference?
 
     ???- tip "Answer (Example with Tetralith)"
 
         Archiving and compressions step REMOTELY
 
-        - ``tar -cvzf many_files_sftp.tar.gz many_files``
+        - ``tar -cvf many_files_sftp.tar many_files``
 
         Establish SFTP connection