yum install lszrz

apt-get install lszrz

wget http://down1.chinaunix.net/distfiles/lrzsz-0.12.20.tar.gz 
tar zxvf lrzsz-0.12.20.tar.gz
cd lrzsz-0.12.20
./configure
make
make install

cd /usr/bin
ln -s /usr/local/bin/lrz rz  
ln -s /usr/local/bin/lsz sz

#open SecureCRT terminal

sz 1.txt   # send file from linux to window

rz 2.txt   # receive file from window to linux

sz rz SecureCRT