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How to replace multiple spaces in a file using SED?
I tried to replace multiple spaces in a file to single space using sed. But it splits each and every character like below. Please let me know what the problem is Your sed command does the wrong thing because it’s matching on “zero or more spaces” which of course happens between each pair of characters!
How to replace multiple chars into one space?
Instead of s/ */ /g you want s/ */ /g or s/ +/ /g. Using tr, the -s option will squeeze consecutive chars to a single one: Good grief that was terse, because * matches zero or more it inserted a space after every character, you want + which matches one or more. Also I switched the order because in doing so you don’t have to cat the file.
Why does the sed command do the wrong thing?
Your sed command does the wrong thing because it’s matching on “zero or more spaces” which of course happens between each pair of characters! Instead of s/ */ /g you want s/ */ /g or s/ +/ /g. Using tr, the -s option will squeeze consecutive chars to a single one:
Is there a way to set multiple periods in SED?
It’s a shame that sed doesn’t consistently support range expressions. The {2,} just says to match 2 or more, so that if you run into periods in other places, you wont have an issue. The ‘-e’ proceeds multiple regexes, and the ‘-r’ means use extended regexes. Hope it works, it does on gnu sed 4.1.2.
How to replace all spaces with X in Bash?
When I use sed to replace all the spaces with X, the command works, the command being: It doesn’t work. What am I doing wrong? Note that I’m new to shell scripting.
How to replace multiple periods with vertical slash?
I can’t get sed to replace multiple periods with a vertical slash. My current attempts have been like this: I’ve already used this to replace leading and trailing whitespace with vertical slashes: Now I just need to do the same for a string of periods.
How to replace multiple spaces in JavaScript regex?
Also, if you’re going to do string replacement remember to re-assign the variable/property to its own replacement, eg: A more robust method: This takes care of also removing the initial and trailing spaces, if they exist. Eg:
When to use grep instead of grep in SED?
The use of grep is redundant, sed can do the same. The problem is in the use of * which also match 0 spaces. With GNU sed, you may use \\+ instead: to delete all lines that does not contain the substring hdisk, and to replace all runs of two or more spaces with single spaces, or
How to insert a line with spaces to a specific line?
I have a line with spaces in the start for example ” Hello world”. I want to insert this line to a specific line in a file. for example insert ” hello world” to the next file I am using this sed script: You can escape the space character, for example to add 2 spaces:
How to replace all white spaces with one TR?
The number of spaces is not fixed. What is the best way to replace all the white spaces with one space using only tr? Please try and avoid sed. When you change a field in record, awk rebuild $0, takes all field and concat them together, separated by OFS, which is a space by default.