UNIX for Dummies Questions & Answers

Dear all,

I want to offset the file numbers. can you please make some awk code or linux code for the same.

Example:
input file names

Code:

ANI_WFMASS_PIST00001.gif
ANI_WFMASS_PIST00002.gif
.
.
.
ANI_WFMASS_PIST0000n.gif

offset --> 30

ANI_WFMASS_PIST00031.gif
ANI_WFMASS_PIST00032.gif
.
.
.
ANI_WFMASS_PIST000(30+n).gif

Please help me somebody.


Thanks in advance.

Best regards,
Krishna

Moderator's Comments:

Please use code tags next time for yur code and data

Do you want to rename the files?

Any attempts from your side?

Will the layout always be like:

Code:

ANI_WFMASS_PIST0000n.gif

I am referring to the exact character layout:
grab third word, using _ as delimiter [PIST0000n.gif]
grab first word using . as delimiter [PIST0000n]
grab beginning with 5th letter [0000n]

Yes i want to rename the files

Thanks

---------- Post updated at 06:04 AM ---------- Previous update was at 06:03 AM ----------

I am new to awk code i dont know much commands. plz help this time, i will learn from that. Thanks RudiC

---------- Post updated at 06:08 AM ---------- Previous update was at 06:04 AM ----------

Joeyg:
Will the layout always be like:

Code:
ANI_WFMASS_PIST0000n.gif

I am referring to the exact character layout:
grab third word, using _ as delimiter [PIST0000n.gif]
grab first word using . as delimiter [PIST0000n]
grab beginning with 5th letter [0000n].
-----------------------------------------------------------------------

I have vba code with this logic, but i have to transfer files every time, so I want to rename in linux.

I am new to awk. can you please make code (awk or linux).

Thank you so much.
Krishna

This can be done only using shell built-ins (except for the ls and mv commands). Note that it uses a reverse order ls to move the highest numbered files first in case moving a lowered numbered file might overwrite a higher numbered file if they were renumbered in order.

Code:

cat *r
#!/bin/ksh
off=${1:-30}
ls -r ANI_WFMASS_PIST*.gif | while IFS='T.' read -r f num t
do	# Strip leading zeroes from $num
	if [ "$num" = "00000" ]
	then	old=0
	else	old=${num##*0}
	fi
	new=$(printf '%05d' "$((old + off))")
	echo mv "${f}T$old.$t" "${f}T$new.$t"
done

It defaults to adding 30 to each file number. If you invoke this script with one operand, it will use that operand as the offset instead of the default.

If this script correctly prints the mv commands you want, remove the echo shown in red and rerun it to actually rename the files.

Thank you Craygun for your reply.

i am getting this below output from your code.

1. the old file is missing the 000 before the number.
2. for picture number with 10.gif reading as null. i dont know how to rectify this.

mv ANI_WFMASS_PIST16.gif ANI_WFMASS_PIST00046.gif
mv ANI_WFMASS_PIST15.gif ANI_WFMASS_PIST00045.gif
mv ANI_WFMASS_PIST14.gif ANI_WFMASS_PIST00044.gif
mv ANI_WFMASS_PIST13.gif ANI_WFMASS_PIST00043.gif
mv ANI_WFMASS_PIST12.gif ANI_WFMASS_PIST00042.gif
mv ANI_WFMASS_PIST11.gif ANI_WFMASS_PIST00041.gif
mv ANI_WFMASS_PIST.gif ANI_WFMASS_PIST00030.gif
mv ANI_WFMASS_PIST9.gif ANI_WFMASS_PIST00039.gif
mv ANI_WFMASS_PIST8.gif ANI_WFMASS_PIST00038.gif
mv ANI_WFMASS_PIST7.gif ANI_WFMASS_PIST00037.gif
mv ANI_WFMASS_PIST6.gif ANI_WFMASS_PIST00036.gif
mv ANI_WFMASS_PIST5.gif ANI_WFMASS_PIST00035.gif
mv ANI_WFMASS_PIST4.gif ANI_WFMASS_PIST00034.gif
mv ANI_WFMASS_PIST3.gif ANI_WFMASS_PIST00033.gif
mv ANI_WFMASS_PIST2.gif ANI_WFMASS_PIST00032.gif
mv ANI_WFMASS_PIST1.gif ANI_WFMASS_PIST00031.gif

Thanks again,

Looking for your reply.