Computer Literacy Lecture 3: Basic Commands of UNIX

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Computer LiteracyLecture 3 Basic Commands of
UNIX
UEC Academic Skills I

• International Student Center
• The University of Electro-Communications
• Tokyo Japan
• 2005

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Basic Commands in Unix

• pwd ? Shows the current working
• directory

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Basic Commands in Unix

• ls al ? List all folders and files with
• details

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Basic Commands in Unix

• more file_name ? View a file page by page (Use
  q
• to quit)
• cat file_name ? View the content of a file at
  once
• less file_name ? View the content of a file
• (Use q to quit)
• cd dir_name ? Change directory
• mkdir dir_name ? Make directory
• rmdir dir_name ? Remove directory
• rm file_name ? Remove/delete file

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Basic Commands in Unix

• finger ? List all users that are logged in.
• (this command works at Hawk at IPC use the
  command who)

hawk.fedu.uec.ac.jp finger
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Basic Commands in Unix

• List all users that are logged in at IPC use the
  command who

echo-1 who
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Basic Commands in Unix

• finger user_name ? Show information about the
  users accounts that contain the specified name
  as part of the real-name of the user

hawk.fedu.uec.ac.jp finger suzuki
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Redirection command (gt, gt!, gtgt)
Another way to use more command
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Task 1 finger user_name more

• -  Login to hawk server using ssh command
• - finger suzuki gt s1.txt
• (check the file s1.txt using more).

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Task 1 finger user_name more

• - finger Bing gtgt s1.txt
• (check the file s1.txt using more).

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Task 1 finger user_name more

• - finger lu gt! s1.txt
• (check the file s1.txt using more).

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File Transfer Protocol (FTP)
The two main commands in FTP -  get allows to
get one file from a remote computer (ftp
server). -  put allows to put one file from your
current location to a remote computer (ftp
server). Note-1 To use a ftp server, should
have a user account at that server Note-2
After transferring files, close the ftp session
by typing bye.
Fig 1 FTP commands usage
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Task 2 Create file ipc_ftp_1.txt using the
mule editor at IPC

• mule ipc_ftp_1.txt (because of command
  prompt can be used without closing the opened
  file).
• - Type any text in the ipc_ftp_1.txt file.
  Save and exit mule
• - Check whether the file was successfully
  created with ls al
• - Check the content of the file ipc_ftp_1.txt
  with less ipc_ftp_1.txt

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Task 3 Transfer a file from IPC to hawk

• -Put the created file (ipc_ftp_1.txt) into hawk
  server.
• ftp hawk.fedu.uec.ac.jp
• (type your username and password)
• ftpgt put ipc_ftp_1.txt
• ftpgt bye (or quit)
• -Login to hawk and check if the file was
  successfully transferred.
• ssh -l f04 hawk.fedu.uec.ac.jp
• ls al
• less ipc_ftp_1.txt

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Task 4 Create a file in hawk

• Login to hawk server ssh -l f04
  hawk.fedu.uec.ac.jp
• Create the file finger gt! hawk_ftp_1.txt
• Check the content of the created file less hawk
  _ftp_1.txt
• Task 5 Transfer a file from hawk to IPC
• Get the file, hawk_ftp_1.txt from hawk
• ftp hawk.fedu.uec.ac.jp (type your username and
  password)
• ftpgt get hawk_ftp_1.txt
• ftpgt bye (or quit)
• Check if the file was successfully transferred to
  IPC and check its content.
• ls al
• less hawk_ftp_1.txt

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Task 6 Transfer the file hawk_ftp_1.txt with
its name changed to hawk_ftp_2.txt from hawk to
IPC.

• Task 6-A
• Make the following changes in the file just
  transferred to IPC (hawk_ftp_1.txt)
• Write Modified file as the title of the file
  hawk_ftp_1.txt using the mule editor.(modify the
  file at hawk)
• mule hawk_ftp_1.txt
• Save the changes and leave mule editor. Also
  logout from hawk

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Task 6-B Get file hawk_ftp_1.txt from hawk

• ftp hawk.fedu.uec.ac.jp
• ftpgtget hawk_ftp_1.txt hawk_ftp_2.txt
• ftpgtbye (or quit)
• Check whether the file was successfully
  transferred to IPC and check its content.
• ls al
• less hawk_ftp_2.txt
• Check the difference between the two files
  hawk_ftp_1.txt and hawk_ftp_2.txt using,
• diff hawk_ftp_1.txt hawk_ftp_2.txt