Claro que isso deve funcionar.
Mas certifique-se de verificar com o comando 'stat'.
sh-4.3$ stat test.csv
File: 'test.csv'
Size: 871 Blocks: 8 IO Block: 4096 regular file
Device: 20fd4bh/2161995d Inode: 8389896 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ cg) Gid: ( 1000/ cg)
Access: 2016-01-06 05:29:32.220197637 +0000
Modify: 2016-01-06 05:29:32.220197637 +0000
Change: 2016-01-06 05:29:32.220197637 +0000
Birth: -
sh-4.3$