asp.net mvc barcode reader $ ! ls mydata today reports in Software

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$ ! ls mydata today reports
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History Event Editing
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You can also edit any event in the history list before you execute it. In the BASH shell, you can do this two ways. You can use the command line editor capability to reference and edit any event in the history list. You can also use a history fc command option to reference an event and edit it with the full Vi editor. Each approach involves two different editing capabilities. The first is limited to the commands in the command line editor, which edits only a single line with a subset of Emacs commands. At the same time, however, it enables you to reference events easily in the history list. The second approach invokes the standard Vi editor with all its features, but only for a specified history event. With the command line editor, not only can you edit the current command, but you can also move to a previous event in the history list to edit and execute it. The CTRL-P command then moves you up to the prior event in the list. The CTRL-N command moves you down the list. The ESC-< command moves you to the top of the list, and the ESC-> command moves you to the bottom. You can even use a pattern to search for a given event. The slash followed by a pattern searches backward in the list, and the question mark followed by a pattern searches forward in the list. The n command repeats the search. Once you locate the event you want to edit, you use the Emacs command line editing commands to edit the line. CTRL-D deletes a character. CTRL-F or the RIGHT ARROW moves you forward a character, and CTRL-B or the LEFT ARROW moves you back a character. To add text, you position your cursor and type in the characters you want. Table 131 lists the different commands for referencing the history list. If you want to edit an event using a standard editor instead, you need to reference the event using the fc command and a specific event reference, such as an event number. The editor used is the one specified by the shell in the EDITOR variable. This serves as the default editor for the fc command. You can assign to the EDITOR variable a different editor if you wish, such as emacs instead of vi. The next example will edit the fourth event, cd reports, with the standard editor and then execute the edited event:
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$ fc 4
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You can select more than one command at a time to be edited and executed by referencing a range of commands. You select a range of commands by indicating an identifier for the first command followed by an identifier for the last command in the range. An identifier can be the command number or the beginning characters in the command. In the next example, the range of commands 2-4 are edited and executed, first using event numbers and then using beginning characters in those events:
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$ fc 2 4 $ fc vi c
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fc uses the default editor specified in the FCEDIT special variable. Usually, this is the Vi editor. If you want to use the Emacs editor instead, you use the -e option and the term emacs when you invoke fc. The next example will edit the fourth event, cd reports, with the Emacs editor and then execute the edited event:
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$ fc -e emacs 4
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Configuring History: HISTFILE and HISTSAVE
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The number of events saved by your system is kept in a special system variable called HISTSIZE. By default, this is usually set to 500. You can change this to another number by simply assigning a new value to HISTSIZE. In the next example, the user changes the number of history events saved to 10 by resetting the HISTSIZE variable:
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