how to move specific files based on a key and rename them - bash

Question

I have over 100000 files.
for example, I mentioned 3 files below
bcbb79d8-1d4a-4fbb-b16c-4df86839773e.htseq.counts.gz
bcdc68db-c874-4097-9c46-b06e331caaf5.htseq.counts.gz
bd4b6975-90d9-43f8-aadc-344d04644822.htseq.counts.gz
I have a text file named key.txt with the following information.
File Name ID
bcbb79d8-1d4a-4fbb-b16c-4df86839773e.htseq.counts.gz TCCC-06-0210
bcdc68db-c874-4097-9c46-b06e331caaf5.htseq.counts.gz TCHA-27-2519
bd4b6975-90d9-43f8-aadc-344d04644822.htseq.counts.gz TCHU-76-4929
I want to take only those files that their name are in the key , move them to a new folder and change their name to the ID.

Answer 1

I guess a little more of a write up rather than a comment would be helpful. The approach to take is to read the filename (fname) and ID (id) from each line in key.txt and then validate that fname is a file and does exist, and then move the file in "$fname" to whatever "/path/to/move/to/$id" you need.
For example:
#!/bin/bash
## read each line into variables fname and id (handle non-POSIX eof)
while read -r fname id || [ -n "$fname" ]; do
## test that "$fname" is a file, and if so, move to destination
[ -f "$fname" ] && mv "$fname" "/path/to/move/to/$id"
done < key.txt
(note: a POSIX end-of-file (eof) is simply the final '\n' at the end of the last line. Some editors do not enforce it and it will cause your read to miss the final line of data unless you check that "$fname" was filled with data (is non-empty) -- the [ -n "$fname" ] added to the end of the white read -r ...)
You are feeding the loop with a redirection of key.txt. Each iteration of the while loop will read a new line from key.txt into the variables fname and id (word-splitting on the default Internal Field Separator (IFS). After the read and separation into fname and id, you simply verify $fname holds a valid filename (in the current working directory) and then mv the file where you want it.
You should execute the script in the directory containing the files, or append a relative or absolute filename to where they are located to "$fname".
Example
Here is a short example that may help clear things up:
The move_rename.sh script:
$ cat move_rename.sh
#!/bin/bash
## read each line into variables fname and id (handle non-POSIX eof)
while read -r fname id || [ -n "$fname" ]; do
## test that "$fname" is a file, and if so, move to destination
[ -f "$fname" ] && mv "$fname" "dest/$id.txt"
done < key.txt
The key.txt file:
$ cat key.txt
File Name ID
bcbb79d8-1d4a-4fbb-b16c-4df86839773e.htseq.counts.gz TCCC-06-0210
bcdc68db-c874-4097-9c46-b06e331caaf5.htseq.counts.gz TCHA-27-2519
bd4b6975-90d9-43f8-aadc-344d04644822.htseq.counts.gz TCHU-76-4929
File locations before script execution. (dest) is the directory to move to. (that is ls -one output not ls -L(lowercase), the ls -al is `L(lowercase))
$ ls -1
dest
bcbb79d8-1d4a-4fbb-b16c-4df86839773e.htseq.counts.gz
bcdc68db-c874-4097-9c46-b06e331caaf5.htseq.counts.gz
bd4b6975-90d9-43f8-aadc-344d04644822.htseq.counts.gz
key.txt
move_rename.sh
$ ls -al dest
total 16
drwxr-xr-x 2 david david 4096 Jan 17 20:05 .
drwxr-xr-x 16 david david 12288 Jan 17 20:05 ..
Execute the script
$ bash move_rename.sh
Working directory contents after execution
$ ls -1
dest
key.txt
move_rename.sh
Contents of dest after execution.
$ ls -al dest
total 8
drwxr-xr-x 2 david david 4096 Jan 17 20:00 .
drwxr-xr-x 3 david david 4096 Jan 17 20:00 ..
-rw-r--r-- 1 david david 0 Jan 17 19:59 TCCC-06-0210.txt
-rw-r--r-- 1 david david 0 Jan 17 19:59 TCHA-27-2519.txt
-rw-r--r-- 1 david david 0 Jan 17 19:59 TCHU-76-4929.txt