kujyp · July 15, 2019 05:59
diff --git a/subshelltest.sh b/subshelltest.sh
 #!/bin/bash

 a=abc!!
 echo a=[$a]
 echo ""

 result=`echo $a | sed -e 's/!/\\\\!/g'`
 echo \`~\`=[$result]
 echo ""

 result=$(echo $a | sed -e 's/!/\\\\!/g')
 echo \$\(~\)=[$result]
 echo ""


 # > a=[abc!!]
 # > 
 # > `~`=[abc\!\!]
 # > 
 # > $(~)=[abc\\!\\!]
	#!/bin/bash

	a=abc!!
	echo a=[$a]
	echo ""

	result=`echo $a \| sed -e 's/!/\\\\!/g'`
	echo \`~\`=[$result]
	echo ""

	result=$(echo $a \| sed -e 's/!/\\\\!/g')
	echo \$\(~\)=[$result]
	echo ""


	# > a=[abc!!]
	# >
	# > `~`=[abc\!\!]
	# >
	# > $(~)=[abc\\!\\!]