search and replace with sed command


 
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# 1  
Old 06-16-2011
Bug search and replace with sed command

hi,

suggest me in the below script..

if [ a -eq 1 ]

In above I wanna replace "[" and "]" with "[[" and "]]".
# 2  
Old 06-16-2011
Code:
 
bash-3.00$ sed -e 's/\]/&&/g' -e 's/\[/&&/g' /tmp/myfile
if [[ a -eq 1 ]]

bash-3.00$ cat /tmp/myfile
if [ a -eq 1 ]

This User Gave Thanks to itkamaraj For This Post:
# 3  
Old 06-16-2011
In the pattern area, the backslash is only necessary before the opening bracket, the otherone before the closing bracket is useless (since no opening bracket before, it is taken as litteral) :
Code:
$ echo "if [ a -eq 1 ]" | sed 's/\[/&&/g;s/]/&&/g'
if [[ a -eq 1 ]]

This User Gave Thanks to ctsgnb For This Post:
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