《aix系统应用基础》05usingfil.ppt

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 named 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 commandsUse 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:$pwd/home/team01/doc$cp/home/team03/pgms/suba programa,mon_reporttrio_ltrwalrus,home,team01,doc,mon_reportprogramatrio_ltrwalrus,home,team01,doc,cp source targetcp file1 file2.target_dir,before,after,Copying Files,Copyright IBM Corporation 2008,$cd/home/team01$cp doc/programa test1 c,home,team01,.profilemanualstest1,c,doc,programa,home,team01,.profilemanualstest1,c,programa,programatest1,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.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_ltrletter,doc,home,team01,c,trio_ltr,t.letter,doc,home,team01,c,mon_report,doc,$pwd/home/team01/c$mv./doc/mon_report.,mv Examples,Copyright IBM Corporation 2008,$cat walrusThe time has come,the Walrus said,To talk of many things:Of shoes-and ships-and sealing wax-Of cabbages-and kings-And why the sea is boiling hot-And whether pigs have wings.From The Walrus And The Carpenterby Lewis Carroll(1871),cat file1 file2.,Listing File Contents,Copyright IBM Corporation 2008,pg filenamemore filename,$pg walrusThe 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 wings.:,one page at a time,$more walrusThe time has come,the Walrus said,To talk of many things:Of shoes-and ships-and sealing wax-Of cabbages-and kings-And why the sea is boiling hot-And whether pigs have wings.walrus(100%),Displaying Files,Copyright IBM Corporation 2008,17126 1085 myfile,characters,words,lines,wc Command,The wc command counts the number of lines,words,and bytes in a named file:$wc-c-l-w filenameOptions:-ccounts the number of bytes-lcounts lines-wcounts wordsExample:$wc myfile,Copyright IBM Corporation 2008,Activity,Activity:Working with the wc Command,Copyright IBM Corporation 2008,Allows files to have more than one name in the directory structure Both files reference the same i-node Cannot be used with directories,cannot span file systems,ln source_file target_file,Linking Files,$ls li63-rw-r-r-2 team01 staff 1910 Nov 21 14:19 man_files$ln man_files manuals$ls-li63-rw-r-r-2 team01 staff 1910 Nov 21 14:19 man_files63-rw-r-r-2 team01 staff 1910 Nov 21 14:19 manuals$,Copyright IBM Corporation 2008,Creates an indirect reference to a file(symbolic link)Name references the original files name and path Can be used with directories and span file systems,ln s source_file target_file,Linking Files(cont.),$ls li63-rw-r-r-2 team01 staff 1910 Nov 21 14:19 man_files$ln s man_files manuals$ls-li63-rw-r-r-1 team01 staff 1910 Nov 21 14:19 man_files66 lrwxrwxrwx 1 team01 staff 1910 Nov 21 14:19 manuals-man_files$,Copyright IBM Corporation 2008,rm file1 file2 file3.,Removing Files,$lsmon_report trio_ltr walrus$rm mon_report$lstrio_ltr walrus$rm i walrusrm:remove walrus?y$lstrio_ltr$,Copyright IBM Corporation 2008,Printing Files,qprt-queue files to the printerqchk display the current status of a print queueqcan cancel a print job(specify job number),$qprt walrus$qchkQueue Dev Status Job Files User PP%Blks Cp Rnklp0 lp0 Running 99 walrus team01 1 1 1 1$qcan x 99$,Copyright IBM Corporation 2008,Checkpoint,What is the effect of the following commands?$cd/home/team01$cp file1 file2What is the effect of the following commands?$cd/home/team01$mv file1 newfileWhat is the effect of the following commands?$cd/home/team01$ln newfile myfileList commands that can be used to view the contents of a file.,Copyright IBM Corporation 2008,Checkpoint Solutions,What is the effect of the following commands?$cd/home/team01$cp file1 file2The cp command creates a new file,file 2 from a copy of file1.Each copy will have a different name,as shown,file1 and file2.The two copies are independent of each other.If one file is modified,it does not reflect in the second file.What is the effect of the following commands?$cd/home/team01$mv file1 newfileThese commands will rename file1 to newfile.file1 will no longer exist,but instead be shown as newfile.What is the effect of the following commands?$cd/home/team01$ln newfile myfileThe 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 that change will also be reflected if using myfile.List commands that can be used to view the contents of a file.cat,pg,more,Copyright IBM Corporation 2008,Exercise:Using Files,Copyright IBM Corporation 2008,Unit Summary,The cp command can be used to copy files.The mv command can be used to move and rename files.The ln command can be used to create additional names for a file.Display the contents of a file using cat,pg,or more.Use the rm command to delete files.Use the qprt command to print files.The wc command could be used to count words or lines from files or command output.,