The Databar System at DTU - G-Bar Wiki

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16 The Databar System at DTU Copy, delete, and move documents You can copy a document with the command cp (copy) followed by the old and the new names, as shown here. That is, n-62-14-4(s001234) $ cp old.letter new.letter will establish a new document with the name new.letter, and it will be exactly like the old.letter. The command can also be used to copy several documents at once. In that case the “new name” is not a file name, but a new folder name instead. If you are in the sub-directory (folder) dir.no.1, the command n-62-14-4(s001234) $ cp ../doc* . copies the files doc1 and doc2 down to dir.no.1. Note that ‘..’ denotes the folder that is just one level above the current folder, and ‘.’ denotes the folder you are currently in. The character ‘*’ is a so-called wild card character that can stand in for any string of characters (so the command doc* gives you all documents that begin with doc). You can delete a document with the command rm (remove) followed by the document name (providing that you have a write access to the documents and folders). For example, the command n-62-14-4(s001234) $ rm doc1 deletes the file doc1. A document can be moved with the command mv (move). The same command is used to change the name of a document. For example, the command n-62-14-4(s001234) $ mv doc2 dir.no.1/doc7 moves the document doc2 to the folder dir.no.1 and at the same time the name will be changed to doc7. Make and delete folders You can make a new folder with mkdir (make directory). For example, n-62-14-4(s001234) $ mkdir newdir makes a new folder with the name newdir. The command n-62-14-4(s001234) $ rmdir newdir (remove directory) will delete it again. (A folder can only be deleted with this command, if it is empty.) If the folder contains files, the command n-62-14-4(s001234) $ rm -r newdir (remove recursive) will delete the folder and all files and other folders under it. 6 6 By default, G-Bar asks you to confirm every file that you you delete – And this may seem like unnecessary work if you have several hundred files to delete. Thus, it is possible to work
6 The G-Bar 17 Making and changing documents ASCII files can be revised with an editor, keying in the contents without hidden formating characters (as in Microsoft Word and other application programs). This command is used, for example, in writing programs and LATEX documents. An editor that is simple to use is nedit. If you write n-62-14-4(s001234) $ nedit doc1 a window, which shows you the full contents of doc1 and in which you can change the contents, opens There are myriads of editors on the system. More advanced users often prefer emacs, which is a powerful editor that knows the syntax for many programming languages and also for LATEX. Manuals about UNIX-commands There are a lot of UNIX commands, and some of them are associated with a number of parameters. A useful command that links to online manuals is man. For example, n-62-14-4(s001234) $ man cp refers to online UNIX manuals and from there gives you a thorough explanation of how to use the command cp for copying documents. Sometimes it is still hard to know what command to use. In this case, it is a good idea to use the command man -k with the keyword as the argument. The command n-62-14-4(s001234) $ man -k copy will, for example, give you a list of commands that can be used in connection with copying. The list includes the command cp. Another useful command like the man command is info, which gives a bit more advanced information, and sometimes it also tells more about programs than man does. Other sources of information UNIX (incl. Linux) is being more and more widely distributed, so there are a lot of other places to find information as well, such as Google. At the G-Bar home page you can also find some good links to information about UNIX. 6.5.3 Setting up a command environment UNIX commands are executed in certain environments, and it can be useful for the more experienced user to alter these environments. This section describes briefly how to check the UNIX environment and alter it. around the protection default if you use the direct path rm: n-62-14-4(s001234) $ /bin/rm -r newdir which deletes all files in the newdir without asking for confirmation before deleting each one.
Page 1 and 2: The Databar System at DTU September
Page 3 and 4: Contents 3 Contents 1 Introduction
Page 5 and 6: 2 Databar system 5 Databar Building
Page 7 and 8: 6 The G-Bar 7 ThinLinc is a client
Page 9 and 10: 6 The G-Bar 9 some commands and pro
Page 11 and 12: 6 The G-Bar 11 Desktops IceWM gives
Page 13 and 14: 6 The G-Bar 13 Figure 3: The tree s
Page 15: 6 The G-Bar 15 are other, and often
Page 19 and 20: 6 The G-Bar 19 drive. 9 Most of the
Page 21 and 22: 6 The G-Bar 21 Figure 4: Screenshot
Page 23 and 24: 7 The Winbar 23 n-62-14-4(s001234)
Page 25 and 26: 7 The Winbar 25 7.5 Scanners Scanne
Page 27 and 28: 9 Mac at DTU 27 can also print to t

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