Resizing Disk Images in Linux
To resize the disk image in Linux, do
# sudo fsck.ext4 -f DISK_IMAGE_FILE
# sudo resize2fs DISK_IMAGE_FILE
This is very helpful specially if you are having an instance in the cloud and wanted to resize an image.
Using sed with backreference as the replacement pattern
Tinkering with sed, I have manage to try using regular expressions using backreferences using the most common \N where N is the number of position inside the parenthesis. Searches and replaces the zoo.color to zoo['color'] or zoo.animals to zoo['animals']: cat zoo.js | sed -E "s/(zoo)(\.)([a-zA-Z0-9]*)/\1['\3']/g"|less \1 = is the characters inside the first parenthesis w/c is the zoo \3 = is the characters inside the third parenthesis which involves alpha-numeric -E will interpret as regular expressions as extended (modern) regular expressions rather than basic regular expressions (BRE's) Another example, you can use this for replacing such a string let say, in a SQL statement, example SQL string: CREATE DEFINER=`mysqluser`@`%` FUNCTION `total`(cost DOUBLE, income DOUBLE, lng2 DOUBLE) RETURNS double And you wanted to remove DEFINER=`mysqluser`@`%` and allow FUNCTION to be a dynamic string so you'll just need to catch tha...
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