User:Minooz/RepoSyncProj/Bash

Bash Scripting Help

Tutorial

Shell Programming

Linux org

Tips

• Watch the spaces

if [ -d "$tmpInternal" ]; then
	rm -r $tmpInternal >> $dateError.txt 
elif [ -d "$tmpExternal" ]; then
	rm -r $tmExternal >> $dateError.txt 
fi

• The increment operator in bash

while [ $revTmpInternal -lt $revInternal ]; do
	((revTmpInternal++))
done

• to check if a file exists:

if [ -f m.patch ]; then
	rm *.patch
fi

• To check if multiple files exist:http://www.ducea.com/2009/03/05/bash-tips-if-e-wildcard-file-check-too-many-arguments/

files=$(ls /tmp/*.cache)
if [ $files ]
then
echo "Cache files exist: do something with them"
else
echo "No cache files..."
fi