Вы могли бы сделать:
file=path/to/symlink
{ rm -f -- "$file" && cat > "$file"; } < "$file"
(, который копирует только содержимое, а не метаданные файла, такие как разрешения и права собственности ).
От человека:
-d
Report activity for each block device<....>Device names may also be pretty-printed if option -p is used
-p
Pretty-print device names. Use this option in conjunction with option -d. By default names are printed as dev m-n where m and n are the major and minor num- bers for the device. Use of this option displays the names of the devices as they (should) appear in /dev. Name mappings are controlled by /etc/syscon- fig/sysstat.ioconf.
sar -p -d 1 1
07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00