《aix系统应用基础》05usingfil

1、 Copyright IBM Corporation 2008,Unit 5 Using Files, Copyright IBM Corporation 2008,Unit Objectives,After completing this unit, you should be able to: Use the cp command to copy files Use the mv command to move or rename files Use the wc command to count the number of lines, words, and bytes in a nam

2、ed file Use the ln command to allow a file to have more than one name Display the contents of a file using the cat, pg, and more commands Use the rm command to remove files Print files, Copyright IBM Corporation 2008,To copy the file /home/team03/pgms/suba to /home/team01/doc and name it programa: $

3、 pwd /home/team01/doc $ cp /home/team03/pgms/suba programa,mon_report trio_ltr walrus,home,team01,doc,mon_report programa trio_ltr walrus,home,team01,doc,cp source target cp file1 file2 . target_dir,before,after,Copying Files, Copyright IBM Corporation 2008,$ cd /home/team01 $ cp doc/programa test1

4、c,home,team01,.profile manuals test1,c,doc,programa,home,team01,.profile manuals test1,c,programa,programa test1,doc,home,team01,c,trio_ltr,trio_ltr,doc,home,team01,c,trio_ltr,doc,$ cd /home/team01/doc $ cp trio_ltr ./c,cp Examples, Copyright IBM Corporation 2008,$ pwd /home/team01/c $ mv trio_ltr t

5、.letter,home,team01,c,trio_ltr,home,team01,c,t.letter,mv source target mv file1 file2 . target_dir,Moving and Renaming Files, Copyright IBM Corporation 2008,$ pwd /home/team01/c $ mv t.letter ./doc/letter,home,team01,c,mon_report,doc,home,team01,c,trio_ltr letter,doc,home,team01,c,trio_ltr,t.letter,

6、doc,home,team01,c,mon_report,doc,$ pwd /home/team01/c $ mv ./doc/mon_report .,mv Examples, Copyright IBM Corporation 2008,$ cat walrus The time has come, the Walrus said, To talk of many things: Of shoes - and ships - and sealing wax - Of cabbages - and kings - And why the sea is boiling hot - And w

7、hether pigs have wings. From The Walrus And The Carpenter by Lewis Carroll (1871),cat file1 file2 .,Listing File Contents, Copyright IBM Corporation 2008,pg filename more filename,$ pg walrus The time has come, the Walrus said, To talk of many things: Of shoes - and ships - and sealing wax - Of cabb

8、ages - and kings - And why the sea is boiling hot - And whether pigs have wings. : ,one page at a time,$ more walrus The time has come, the Walrus said, To talk of many things: Of shoes - and ships - and sealing wax - Of cabbages - and kings - And why the sea is boiling hot - And whether pigs have w

9、ings. walrus (100%) ,Displaying Files, Copyright IBM Corporation 2008,17126 1085 myfile,characters,words,lines,wc Command,The wc command counts the number of lines, words, and bytes in a named file: $ wc -c -l -w filename Options: -ccounts the number of bytes -lcounts lines -wcounts words Example: $

10、 wc myfile, Copyright IBM Corporation 2008,Activity,Activity: Working with the wc Command, Copyright IBM Corporation 2008,Allows files to have more than one name in the directory structure Both files reference the same i-node Cannot be used with directories, cannot span file systems,ln source_file t

11、arget_file,Linking Files,$ ls li 63 -rw-r-r- 2 team01 staff 1910 Nov 21 14:19 man_files $ ln man_files manuals $ ls -li 63 -rw-r-r- 2 team01 staff 1910 Nov 21 14:19 man_files 63 -rw-r-r- 2 team01 staff 1910 Nov 21 14:19 manuals $, Copyright IBM Corporation 2008,Creates an indirect reference to a fil

12、e (symbolic link) Name references the original files name and path Can be used with directories and span file systems,ln s source_file target_file,Linking Files (cont.),$ ls li 63 -rw-r-r- 2 team01 staff 1910 Nov 21 14:19 man_files $ ln s man_files manuals $ ls -li 63 -rw-r-r- 1 team01 staff 1910 No

13、v 21 14:19 man_files 66 lrwxrwxrwx 1 team01 staff 1910 Nov 21 14:19 manuals - man_files $, Copyright IBM Corporation 2008,rm file1 file2 file3 .,Removing Files,$ ls mon_report trio_ltr walrus $ rm mon_report $ ls trio_ltr walrus $ rm i walrus rm: remove walrus?y $ ls trio_ltr $, Copyright IBM Corpor

14、ation 2008,Printing Files,qprt - queue files to the printer qchk display the current status of a print queue qcan cancel a print job (specify job number),$ qprt walrus $ qchk Queue Dev Status Job Files User PP% Blks Cp Rnk lp0 lp0 Running 99 walrus team01 1 1 1 1 $ qcan x 99 $, Copyright IBM Corpora

15、tion 2008,Checkpoint,What is the effect of the following commands? $ cd /home/team01 $ cp file1 file2 What is the effect of the following commands? $ cd /home/team01 $ mv file1 newfile What is the effect of the following commands? $ cd /home/team01 $ ln newfile myfile List commands that can be used

16、to view the contents of a file., Copyright IBM Corporation 2008,Checkpoint Solutions,What is the effect of the following commands? $ cd /home/team01 $ cp file1 file2 The cp command creates a new file, file 2 from a copy of file1. Each copy will have a different name, as shown, file1 and file2. The t

17、wo copies are independent of each other. If one file is modified, it does not reflect in the second file. What is the effect of the following commands? $ cd /home/team01 $ mv file1 newfile These commands will rename file1 to newfile. file1 will no longer exist, but instead be shown as newfile. What

18、is the effect of the following commands? $ cd /home/team01 $ ln newfile myfile The file called newfile is now know as myfile. An ls -l will show both files. An ls li will show that both files share the same node number. Note that there is still only one physical file on disk. If a change is made to newfile