You can use cut to access the second field: cut -f2 Edit: Sorry, didn’t realise that SVN doesn’t use tabs in its output, so that’s a bit useless. You can tailor cut to the output but it’s a bit fragile – something like cut -c 10- would work, but the exact value will depend on … Read more
You’re printing the result of the gsub, but gsub does an in-place modify of $2 instead of returning a modified copy. Call gsub, then print: awk -F\, ‘{gsub(/[ \t]+$/, “”, $2); print $2 “:”}’
$ awk -F, ‘NR>1{arr[$1]++}END{for (a in arr) print a, arr[a]}’ file.txt joe 1 jim 1 mike 3 bob 2 EXPLANATIONS -F, splits on , NR>1 treat lines after line 1 arr[$1]++ increment array arr (split with ,) with first column as key END{} block is executed at the end of processing the file for (a … Read more
Here is one method: $ awk ‘{s+=$1}END{print “ave:”,s/NR}’ RS=” ” file ave: 54.646
sed -i ‘/^$/d’ foo This tells sed to delete every line matching the regex ^$ i.e. every empty line. The -i flag edits the file in-place, if your sed doesn’t support that you can write the output to a temporary file and replace the original: sed ‘/^$/d’ foo > foo.tmp mv foo.tmp foo If you … Read more
column(1) is your friend. $ column -t <<< ‘”option-y” yank-pop > “option-z” execute-last-named-cmd > “option-|” vi-goto-column > “option-~” _bash_complete-word > “option-control-?” backward-kill-word > “control-_” undo > “control-?” backward-delete-char > ‘ “option-y” yank-pop “option-z” execute-last-named-cmd “option-|” vi-goto-column “option-~” _bash_complete-word “option-control-?” backward-kill-word “control-_” undo “control-?” backward-delete-char
You can do this by swapping values of the first two fields: awk ‘ { t = $1; $1 = $2; $2 = t; print; } ‘ input_file
You need to set the OFS variable (output field separator) to be a tab: echo “$line” | awk -v var=”$mycol_new” -F’\t’ ‘BEGIN {OFS = FS} {$3 = var; print}’ (make sure you quote the $line variable in the echo statement)
You don’t see anything, because of buffering. The output is shown, when there are enough lines or end of file is reached. tail -f means wait for more input, but there are no more lines in file and so the pipe to grep is never closed. If you omit -f from tail the output is … Read more
You can use the -i flag which makes your pattern case insensitive: grep -iF “success…” file1 Also, there is no need for cat. grep takes a file with the syntax grep <pattern> <file>. I also used the -F flag to search for a fixed string to avoid escaping the ellipsis.