remove first text with shell script

Question

Please someone help me with this bash script, lets say I have lots of files with url like below:

https://example.com/x/c-ark4TxjU8/mybook.zip
https://example.com/x/y9kZvVp1k_Q/myfilename.zip

My question is, how to remove all other text and leave only the file name?

But since the text is random which means it doesn't have exact numbers the code is not working.

using only bash or sh: say that var `x` has such a line, then `echo ${x##*/}` gives you the file name part (`##patern` removes the longest match of (shell-)pattern from the var). — Lars Fischer, Apr 23 '16 at 11:23

Yaitzme · Answer 1 · 2016-04-23T11:16:09.250

2

You can use the sed utility to parse out just the filenames

sed 's_.*\/__'

edited Apr 23 '16 at 11:16

answered Apr 23 '16 at 11:06

Yaitzme

2

If you use `_` as the delimiter, you don't need to escape the `/`. – Jens Apr 23 '16 at 11:07
Thanks Yaitzme, i can use that sed command too , thanks a lot – juicebyah Apr 23 '16 at 11:11
Oh yeah, there's gonna be just one filename per line. – Yaitzme Apr 23 '16 at 11:15
1

Last two underscores are hard to distinguish. You may use another delimiter. – SLePort Apr 23 '16 at 11:34
@Yaitzme no, because `.*/` should match from the start upto the last forward slash. So there must be single match per line. – Avinash Raj Apr 23 '16 at 11:50

MLSC · Answer 2 · 2016-04-24T07:17:28.177

1

You can use awk:

The easiest way that I find:

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

or

awk -F/ '{print $6}' file.txt

You can also use sed:

sed 's;.*/;;' file.txt

You can use cut:

cut -d'/' -f6 file.txt

edited Apr 24 '16 at 07:17

answered Apr 23 '16 at 11:20

MLSC

1

you forget grep, `grep -o '[^/]+$' file` – Avinash Raj Apr 23 '16 at 11:48
I'm not convinced about the cut command or the equivalent use of awk. The important part is to print the _last_ field, not the 6th. – Tom Fenech Apr 23 '16 at 14:57
Yes but there is awk solutions also that print last column @TomFenech – MLSC Apr 24 '16 at 07:16
I can see that, my point is that the solutions using a fixed field don't really add anything useful to your answer. – Tom Fenech Apr 24 '16 at 12:10

2 Answers2