Delete a character in a specified column

Problem:

There is a file: (Tab Delimited)
1 12123 A G bb234t Keep rejj
1 22123 T B cb34n Keep rejj
2 12243 A C cb4423t keeeep rejjj
2 22343 G C hb4t Kep RJJ
3 1113 C G bb2334t Kp Rj

To delete the last character of the 5th column:
1 12123 A G BB234 Keep rejj
1 22123 T B CB34 Keep rejj
2 12243 A C CB4423 keeeep rejjj
2 22343 G C HB4 Kep RJJ
3 1113 C G BB2334 Kp Rj

Answer:

awk ' begin{ofs= ' \ t '}{sub (/.$/, "", $ $)}1 ' file
1 12123 A G BB234 Keep rejj
1 22123 T B CB34 Keep rejj
2 12243 A C CB4423 keeeep rejjj
2 22343 G C HB4 Kep RJJ
3 1113 C G BB2334 Kp Rj

This article is from the "Eight Miles" blog, so be sure to keep this source http://5921271.blog.51cto.com/5911271/1768484

Delete a character in a specified column