How do you grep without space?

This should be grep -E -v , everything after -e is interpreted as the pattern. grep -v -e ‘^[[:space:]]*$’ -e ‘^#’ file will give you all non-blank, non-comment lines in a script or config file (or any file type that uses the hash character for comments).

How do you grep whitespace?

\s seems to work for whitespace, and \S seems to work for non-whitespace, but it includes all whitespace characters (spaces AND tabs) and it doesn’t work if I put it in brackets, treating the backslash and the \s as separate characters. You’ll need to get more clear with your question.

How do I remove extra spaces in Unix?

Simple solution is by using grep (GNU or BSD) command as below.

Remove blank lines (not including lines with spaces). grep . file.txt.
Remove completely blank lines (including lines with spaces). grep “\S” file.txt.

How do I remove leading spaces in Linux?

Use sed ‘s/^ *//g’, to remove the leading white spaces. There is another way to remove whitespaces using `sed` command. The following commands removed the spaces from the variable, $Var by using `sed` command and [[:space:]].

How do you put a space in grep?

The first could be written grep ‘ ‘ a. txt , the second altered similarly. Note that \s also matches tab, return, vertical tab, form feed and, technically, newline. If you want to only match space and tab, use [[:blank:]] or [ \t] .

What is the difference between grep and Egrep?

The difference between grep and egrep is that the grep is a command that allows searching content according to the given regular expression and displaying the matching lines while egrep is a variant of grep that allows to search content by applying extended regular expressions to display the machining lines.

How do I get rid of extra spaces in a text file?

To delete all spaces in the file, replace ‘ +’ with ” (quotes only for demonstration, please remove them). You need to have the checkbox “Regular expression” checked. To remove all spaces and tabs, replace ‘[ \t]+’ with ” (remove quotes).

How do I remove blank space from a text file?

The easy way would be select everything (Ctrl+A), go to Edit>Blank Operation>Trim Trailing Space. This should remove all the spaces in between. You could use a simple regular expression search and replace.

How do I use Xargs command?

The xargs command is used in a UNIX shell to convert input from standard input into arguments to a command. In other words, through the use of xargs the output of a command is used as the input of another command. We use a pipe ( | ) to pass the output to xargs .

How do I remove a space in SED?

sed ‘s/ *$//g’ removes it. Oh sweet… sed ‘s/^[[:space:]]*//g’ is a godsend.

How do you grep a tab?

just use grep “” , it works (if first time: type grep ” then press Ctrl+V key combo, then press TAB key, then type ” and hit enter, voilà!)

Should I use grep or egrep?

grep and egrep does the same function, but the way they interpret the pattern is the only difference. Grep stands for “Global Regular Expressions Print”, were as Egrep for “Extended Global Regular Expressions Print”. The grep command will check whether there is any file with .

Where does \\ B match in grep man?

According to the grep man pages, \\b matches the empty string at the edge of a word. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.

When to use AAA or B in grep man?

Use “AAA\\b” if it’s acceptable to also match AAA followed by any other non-alphanumeric character. According to the grep man pages, \\b matches the empty string at the edge of a word. Thanks for contributing an answer to Stack Overflow!

What kind of grep can you use to find fractions?

Any string of letters that starts with c and ends with e, such as chocolate, Chocolate, case, coarse, etc. Robust fraction grep: Will find fractions, but leave out dates such as 6/98, 9/11, or 6/17/2012. Unfortunately, it fails on 355/113 (which happens to be a reasonably good approximation of?, proving that nothing is perfect).

What do you use grep for in InDesign?

GREP is an incredibly powerful technology for finding and replacing text. It shows up in several places in InDesign, notably the Find/Change dialog box and the GREP Styles feature. But you don’t always have to figure out all the grep codes yourself!