"0,/root.*dfs/{s#root.*dfs.*'#hadoop#g; s#localhost#ip-00-00-00-000.ec2.internal#g}"...
Sed commands can be given with no addresses, in which case the command will be executed for all input lines; with one address, in which case the command will only be executed for input lines which match that address; or with two addresses, in which case the command will be executed for ...
sedwill terminate with exit status 42. If such line was not found (and no other error occurred),sedwill exit with status 0./^foo/is a regular-expression address.qis the quit command.42is the command option.
"0,/root.*dfs/{s#root.*dfs.*'#hadoop#g; s#localhost#ip-00-00-00-000.ec2.internal#g}"...
I can't count the number of times I've wiped work by running a broken command-line twice. The most common error is accidentally using -ne instead of -pe, which results in all data being erased from the originals. Running it again replaces the backups with the newly-emptied files, ...
in which case the command will be executed for all input lines which match the inclusive range of lines starting from the first address and continuing to the second address. Three things to note about address ranges: the syntax is addr1,addr2 (i.e., the addresses are separated by a comma...
To replace multiple blank spaces with a single space, we will use the output of the commandip route showwith a pipeline: ip route show | sed 's/ */ /g' Compare the output ofip route showwith and without the pipeline: Replace Words or Characters in File ...
Command Line Examples Note: The command cat will concatenate files and print on the standard output. The option A will use ^ and M notation to show non-printing characters, display $ at end of each line, and display TAB characters as ^I. ...
COMMAND SYNOPSIS This is just a brief synopsis ofsedcommands to serve as a reminder to those who already knowsed; other documentation (such as the texinfo document) must be consulted for fuller descriptions. Zero-address ``commands'' :label ...
Write the first line of the current pattern space to filename. y/source/dest/ Transliterate the characters in the pattern space which appear in source to the corresponding character in dest. Addresses Sed commands can be given with no addresses, in which case the command will be executed ...