biolocal:ShellFileEditing - Revision history

Gianluca: Bioinfolocal:shellFileEditing moved to biolocal:ShellFileEditing: moving to the right namespace

2008-02-18T10:54:59Z

Bioinfolocal:shellFileEditing moved to biolocal:ShellFileEditing: moving to the right namespace

←Older revision

Revision as of 10:54, 18 February 2008

Gianluca at 19:53, 14 January 2008

2008-01-14T19:53:01Z

←Older revision		Revision as of 19:53, 14 January 2008
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	'''All you can do with sed on text files'''		'''All you can do with sed on text files'''

-	Thinking of the above command as a wrapper to the sed command, it is possible to manipulate the text contained in a file in any way. Here follows a quick guide to use sed (note: the command above is ~~reported~~ in red):	+	Thinking of the above command as a wrapper to the sed command, it is possible to manipulate the text contained in a file in any way. Here follows a quick guide to use sed (note: the command used above is highlighted in red):

Gianluca at 11:03, 14 January 2008

2008-01-14T11:03:24Z

(Difference between revisions)

Gianluca at 10:45, 14 January 2008

2008-01-14T10:45:01Z

←Older revision		Revision as of 10:45, 14 January 2008
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-	Every command described here can be easily ~~made~~ in ~~other scripting~~ high level language (php). The use of bash is preferrable when you can't or won't set up an entire programming environement to launch simple commands against a list of text files.	+	Every command described here can be easily obtained in a high level scripting language (php). The use of bash is preferrable when you can't or won't set up an entire programming environement to launch simple commands against a list of text files.
		+
		+	'''Delete last line from a file/s'''
		+
		+	To obtain a text of a file without last line, just execute:
		+
		+	<pre>
		+	cuttedfile=`sed '$d' filename`;
		+	</pre>
		+
		+	Now you just need to write the new text in the same file:
		+
		+	<pre>
		+	echo "$cuttedfile">filename;
		+	</pre>
		+
		+	If you want to execute the same operation on a list of files contained in the same directory:
		+
		+	<pre>
		+	for filename in `ls`; \
		+	do \
		+	cuttedfile=`sed '$d' $filename`; \
		+	echo "$cuttedfile">$filename; \
		+	done;
		+	</pre>
		+
		+
		+	Please, pay attention to the double quotes used to echo the $cuttedfile variable; they are needed to ensure the content of the text file is entirely kept (carrige returns, tabs and so on).

Gianluca: New page: Every command described here can be easily made in other scripting high level language (php). The use of bash is preferrable when you can't or won't set up an entire programming environeme...

2008-01-14T10:33:52Z

New page: Every command described here can be easily made in other scripting high level language (php). The use of bash is preferrable when you can't or won't set up an entire programming environeme...

New page

Every command described here can be easily made in other scripting high level language (php). The use of bash is preferrable when you can't or won't set up an entire programming environement to launch simple commands against a list of text files.