[root@sugarcube loc]# LC_COLLATE="lt_LT"
[root@sugarcube loc]# export LC_COLLATE
[root@sugarcube loc]# locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE=lt_LT
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=
[root@sugarcube loc]# cat ia.txt
ia
ic
ib
ya
yb
yc

[root@sugarcube loc]# sort ia.txt

ia
ib
ic
ya
yb
yc