I‘m using the date +’%D_%T’ to store Unix system date and time in a shell variable called $_now:
I’d like to replace / and : with _. I’m aware of the following sed command:
> s/:/_/g’ <<<"$_now"
How do I specify two pattern within the same sed command to replace | and : with _ so that I can get output as 01_20_12_16_10_42?
Q. How do I perform a case-insensitive search using sed under UNIX / Linux? I’d like to match all combination of word – foo, FOO, FoO and so on while replacing or performing other operations.
Q. How do I remove all digits or number from my text file or input using sed command?
Q. How do I find and replace character codes ( control-codes or nonprintable characters ) such as ctrl+a using sed command under UNIX like operating systems?
Q. I need to delete all empty lines but could not figure out sed command for the same? How do I delete all empty lines with sed? A. sed is a stream editor and perfect for these kind of work. You need to use d command under sed which is act as the delete function. […]