In daily development, we often use awk command to cut and sort log file columns and count them.
awk sort uniq count example
ylspiritdeMacBook-Pro:awk ylspirit$ cat test_4.txt | awk '{print $1}' | sort | uniq -c
ylspiritdeMacBook-Pro:awk ylspirit$ sort -k1 test_4.txt | awk '{a[$1]++}END{for(i in a) {print i, a[i]}}'
awk column count
ylspiritdeMacBook-Pro:awk ylspirit$ awk '{if($1=="111") {i++}}END{print i}' test_4.txt
linux Sort
- – n : sorted by the size of the value;
- – r : reverse order
- -k : which interval (field) to sort
ylspiritdeMacBook-Pro:awk ylspirit$ cat test_4.txt | awk '{print $1}' | sort | uniq -c | sort -n
