if grep -q SomeString “$File”; then Some Actions # SomeString was found fi You don’t need [[ ]] here. Just run the command directly. Add -q option when you don’t need the string displayed when it was found. The grep command returns 0 or 1 in the exit code depending on the result of search. … Read more
You can use the command: grep –color=”auto” -P -n “[\x80-\xFF]” file.xml This will give you the line number, and will highlight non-ascii chars in red. In some systems, depending on your settings, the above will not work, so you can grep by the inverse grep –color=”auto” -P -n “[^\x00-\x7F]” file.xml Note also, that the important … Read more
-n returns line number. -i is for ignore-case. Only to be used if case matching is not necessary $ grep -in null myfile.txt 2:example two null, 4:example four null, Combine with awk to print out the line number after the match: $ grep -in null myfile.txt | awk -F: ‘{print $2″ – Line number : … Read more
grep -n SEARCHTERM file1 file2 …
grep’s -A 1 option will give you one line after; -B 1 will give you one line before; and -C 1 combines both to give you one line both before and after, -1 does the same.
Use: grep — -X Documentation Related: What does a bare double dash mean? (thanks to nutty about natty).
-m 1 means return the first match in any given file. But it will still continue to search in other files. Also, if there are two or more matched in the same line, all of them will be displayed. You can use head -1 to solve this problem: grep -o -a -m 1 -h -r … Read more
If you’re using Bash, you don’t even have to use grep: files=”*.jpg” regex=”[0-9]+_([a-z]+)_[0-9a-z]*” for f in $files # unquoted in order to allow the glob to expand do if [[ $f =~ $regex ]] then name=”${BASH_REMATCH[1]}” echo “${name}.jpg” # concatenate strings name=”${name}.jpg” # same thing stored in a variable else echo “$f doesn’t match” >&2 … Read more
If using GNU grep, you can use the Perl-style regexp: grep -P ‘\t’ *
The ‘git branch -d’ subcommand can delete more than one branch. So, simplifying @sblom’s answer but adding a critical xargs: git branch -D `git branch –merged | grep -v \* | xargs` or, further simplified to: git branch –merged | grep -v \* | xargs git branch -D Importantly, as noted by @AndrewC, using git … Read more