Compare file name and take action

UNIX for Beginners Q & A
1

Have some files in /tmp/dir

abc.zip
123.zip
345.zip

and if name matches to 345.zip then take action
My code....

am i doing something wrong ? Please advise.

#!/bin/bash
set -x
cd /tmp/dir

for i in *.*
do
  if [[ -f "$i" = "345.zip"]]
  then
   echo "do nothing ........
   '
  else
   echo " do something"
done
2

Running that script you should have seen some error messages. Why don't you post those as well, and be it sheer politeness to give the full picture?

3

Getiting below error

+ cd /tmp/dir
./a.sh: line 6: syntax error in conditional expression
./a.sh: line 6: syntax error near `='
./a.sh: line 6: ` if [[ -f "$i" = "345.zip"]]'

4

Please advise ,where its going wrong in syntax.

5

If you want to know if the file named by the contents of the variable named i is a regular file, use:

  if [[ -f "$i" ]]

If you want to know if the string that is the contents of the variable named i is the string 345.zip , use:

  if [[ "$i" == "345.zip"]]

If you want to know if the file named by the contents of the variable named i is a regular file named 345.zip use:

  if [[ -f "$i" ]] && [[ "$i" == "345.zip"]]

Then note that with your loop (if you have three files one of which is named 345.zip that match the filename matching pattern *.* ) you'll echo do nothing once and echo do something twice. Is that really what you want to do?