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1、Course materials may not be reproduced in whole or in part without the prior written permission of IBM.5.04.1 Copyright IBM Corporation 2008 Unit 5 Using Files Copyright IBM Corporation 2008Unit ObjectivesAfter completing this unit,you should be able to:Use the cp command to copy files Use the mv co
2、mmand 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 Co
3、rporation 2008To copy the file/home/team03/pgms/suba to/home/team01/doc and name it programa:$pwd/home/team01/doc$cp/home/team03/pgms/suba programamon_reporttrio_ltrwalrushometeam01docmon_reportprogramatrio_ltrwalrushometeam01doccp source targetcp file1 file2.target_dir beforeafterCopying Files Copy
4、right IBM Corporation 2008$cd/home/team01$cp doc/programa test1 chometeam01.profilemanualstest1cdocprogramahometeam01.profilemanualstest1cprogramaprogramatest1dochometeam01ctrio_ltrtrio_ltrdochometeam01ctrio_ltrdoc$cd/home/team01/doc$cp trio_ltr./ccp Examples Copyright IBM Corporation 2008$pwd/home/
5、team01/c$mv trio_ltr t.letterhometeam01ctrio_ltrhometeam01ct.lettermv source target mv file1 file2.target_dir Moving and Renaming Files Copyright IBM Corporation 2008$pwd/home/team01/c$mv t.letter./doc/letterhometeam01cmon_reportdochometeam01ctrio_ltrletterdochometeam01ctrio_ltrt.letterdochometeam01
6、cmon_reportdoc$pwd/home/team01/c$mv./doc/mon_report.mv Examples Copyright IBM Corporation 2008$cat walrusThe time has come,the Walrus said,To talk of many things:Of shoes-and ships-and sealing wax-Of cabbages-and kings-And why the sea is boiling hot-And whether pigs have wings.From The Walrus And Th
7、e Carpenterby Lewis Carroll(1871)cat file1 file2.Listing File Contents Copyright IBM Corporation 2008pg filenamemore filename$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 hav
8、e wings.:one page at a time$more walrusThe time has come,the Walrus said,To talk of many things:Of shoes-and ships-and sealing wax-Of cabbages-and kings-And why the sea is boiling hot-And whether pigs have wings.walrus(100%)Displaying Files Copyright IBM Corporation 200817126 1085 myfilecharacterswo
9、rdslineswc CommandThe wc command counts the number of lines,words,and bytes in a named file:$wc-c-l-w filenameOptions:-ccounts the number of bytes-lcounts lines-wcounts wordsExample:$wc myfile Copyright IBM Corporation 2008ActivityActivity:Working with the wc Command Copyright IBM Corporation 2008 A
10、llows files to have more than one name in the directory structure Both files reference the same i-node Cannot be used with directories,cannot span file systemsln source_file target_file Linking Files$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 team
11、01 staff 1910 Nov 21 14:19 man_files63-rw-r-r-2 team01 staff 1910 Nov 21 14:19 manuals$Copyright IBM Corporation 2008 Creates an indirect reference to a file(symbolic link)Name references the original files name and path Can be used with directories and span file systemsln s source_file target_file
12、Linking Files(cont.)$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$Copyright IBM Corporation 2008rm file1 file2 file3.Removing Files$lsmon_repo
13、rt trio_ltr walrus$rm mon_report$lstrio_ltr walrus$rm i walrusrm:remove walrus?y$lstrio_ltr$Copyright IBM Corporation 2008Printing Fileslqprt-queue files to the printerlqchk display the current status of a print queuelqcan cancel a print job(specify job number)$qprt walrus$qchkQueue Dev Status Job F
14、iles User PP%Blks Cp Rnklp0 lp0 Running 99 walrus team01 1 1 1 1$qcan x 99$Copyright IBM Corporation 2008Checkpoint1.What is the effect of the following commands?$cd/home/team01$cp file1 file22.What is the effect of the following commands?$cd/home/team01$mv file1 newfile3.What is the effect of the f
15、ollowing commands?$cd/home/team01$ln newfile myfile4.List commands that can be used to view the contents of a file.Copyright IBM Corporation 2008Checkpoint Solutions1.What is the effect of the following commands?$cd/home/team01$cp file1 file2The cp command creates a new file,file 2 from a copy of fi
16、le1.Each copy will have a different name,as shown,file1 and file2.The two copies are independent of each other.If one file is modified,it does not reflect in the second file.2.What is the effect of the following commands?$cd/home/team01$mv file1 newfileThese commands will rename file1 to newfile.file1 will no longer exist,but instead be shown as newfile.3.What is the effect of the following commands?$cd/home/team01$ln newfile myfileThe file called newfile is now know as myfile.An ls-l will show
