Eclipse Note & sed EclipseUIIDEF#

Remove obsolet workspace

%ECLIPSE_HOME%\configuration\.settings\org.eclipse.ui.ide.prefs

edit key RECENT_WORKSPACES, this is a comma separated list.

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How to insert a few words with new line in beginning of a text file

1. using sed

create a sed file:

1i\
text to insert

sed -f sedfile.sed file.txt

2. using echo, cat

echo text to insert | cat > file2.txt
cat file.txt >> file2.txt