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Read Nth column (e.g. 2nd column) of a row of data in a file that has a specific word (e.g. HOME) on that row and extract the last delimited value for the specified delimiter (e.g. /)

Terminal - Read Nth column (e.g. 2nd column) of a row of data in a file that has a specific word (e.g. HOME) on that row and extract the last delimited value for the specified delimiter (e.g. /)
grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}' OR USE ALTERNATE WAY awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}'
2009-03-05 07:28:26
User: rommelsharma
Functions: awk grep
-3
Read Nth column (e.g. 2nd column) of a row of data in a file that has a specific word (e.g. HOME) on that row and extract the last delimited value for the specified delimiter (e.g. /)

grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}'

OR

awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}'

In this example, we are having a text file that is having several entries like:

---

c1 c2 c3 c4

this is some data

HOME /dir1/dir2/.../dirN/somefile1.xml

HOME /dir1/dir2/somefile2.xml

some more data

---

for lines starting with HOME, we are extracting the second field that is a 'file path with file name', and from that we need to get the filename only and ignore the slash delimited path.

The output would be:

somefile1.xml

somefile2.xml

(In case you give a -ive - pls give the reasons as well and enlighten the souls :-) )

Alternatives

There are 6 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

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What others think

Another way to do it, this time with sed

grep 'HOME.*' data.txt | sed -e 's/.*\/\(.*\)$/\1/'

Comment by OJM 293 weeks and 5 days ago

Why so complicated?

awk -F',' '/HOME/ {print $NF}' data.txt
Comment by lux 293 weeks and 5 days ago

@lux: Typo: awk -F'/' '/HOME/ {print $NF}' data.txt

Very nice solution BTW.

Comment by OJM 293 weeks and 5 days ago

Thanks - inputs appreciated very much and very useful to me.

Comment by rommelsharma 293 weeks and 5 days ago

If file has entries like the following, with 2nd column having the req. data:

---

this is some data

HOME /dir1/dir2/.../dirN/somefile1.xml some more data

HOME /dir1/dir2/somefile2.xml

some more data

---

then

awk -F'/' '/HOME/ {print $NF}' data.txt

would give:

somefile1.xml some more data

somefile2.xml

In such cases, we would need to use:

awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}'

to get only the last delimited value from the second column.

Comment by rommelsharma 293 weeks and 5 days ago

awk is grep on steroids. As shown in comment #2, the search term can always be used in awk.

awk '/search_term/' {print $1}' file

rather than

grep search_term file | awk '{print $1}'

This reminds me of the overly-redundant cat | grep scenario:

cat file | grep search_term
Comment by atoponce 293 weeks and 3 days ago

oops, i added a misalainged quote

awk '/search_term/ {print $1}' file
Comment by atoponce 293 weeks and 3 days ago

Your point of view

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