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i have file in which i want to remove white space from the end of line test.txt is as following (there is white space at the end of line.
ath-miRf10005-akr ath-miRf10018-akr ath-miRf10019-akr ath-miRf10020-akr ath-miRf10023-akr ath-miRf10024-akr i used sed 's/$\s//' but it is not working.
942
Remove just spaces: $ sed 's/ *$//' file | cat -vet - hello$ bye$ ha^I$ # tab is still here! Remove spaces and tabs: $ sed 's/[[:blank:]]*$//' file | cat -vet - hello$ bye$ ha$ # tab was removed!
Type M-x delete-trailing-whitespace to delete all trailing whitespace. This command deletes all extra spaces at the end of each line in the buffer, and all empty lines at the end of the buffer; to ignore the latter, change the variable delete-trailing-lines to nil .
trim() The trim() method removes whitespace from both ends of a string and returns a new string, without modifying the original string. Whitespace in this context is all the whitespace characters (space, tab, no-break space, etc.)
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:]]. $ echo "$Var are very popular now."
Use either a simple blank * or [:blank:]* to remove all possible spaces at the end of the line:
sed 's/ *$//' file Using the [:blank:] class you are removing spaces and tabs:
sed 's/[[:blank:]]*$//' file Note this is POSIX, hence compatible in both GNU sed and BSD.
For just GNU sed you can use the GNU extension \s* to match spaces and tabs, as described in BaBL86's answer. See POSIX specifications on Basic Regular Expressions.
Let's test it with a simple file consisting on just lines, two with just spaces and the last one also with tabs:
$ cat -vet file hello $ bye $ ha^I $ # there is a tab here Remove just spaces:
$ sed 's/ *$//' file | cat -vet - hello$ bye$ ha^I$ # tab is still here! Remove spaces and tabs:
$ sed 's/[[:blank:]]*$//' file | cat -vet - hello$ bye$ ha$ # tab was removed! Try this:
sed -i 's/\s*$//' youfile.txt On OS X:
sed -i '' 's/\s*$//' youfile.txt If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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