split & join for large files

hi

im transfering a large file (4 GB) from my old server to the new server..

i did splited the file using:

split -b838860800 attachment.MYD ./

now i have 5 files:

-rw-r--r-- 1 root 838860800 Sep 23 14:41 aa
-rw-r--r-- 1 root 838860800 Sep 23 14:45 ab
-rw-r--r-- 1 root 838860800 Sep 23 14:48 ac
-rw-r--r-- 1 root 838860800 Sep 23 14:51 ad
-rw-r--r-- 1 root 555517540 Sep 23 14:54 ae

they are now on the new server, but how can i JOIN them to become a 1 file?

i did a `man join` but i think im not on tha right plase..

can any one help..

 

 

 

 

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