xmodem:简单通用，传输信息单位是“包=128B”,传输速度慢，适合电话线路质量差的情况下用
ymodem:由XMODEM演变来，效率可靠性高，包=128*8B；一次传输可发送或接受几个文件
zmodem:于上两种不同，已连续的数据流发送数据，效率更高[摘自http://www.ilebon.net/blog/?7/viewspace-54]
下载lrzsz-0.12.20.tar.gz源码
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luther@gliethttp:~/lrzsz-0.12.20$ ./configure --host=arm-linux
luther@gliethttp:~/lrzsz-0.12.20$ make CC=arm-linux-gcc 编译成使用动态库的程序
luther@gliethttp:~/lrzsz-0.12.20$ make CC=arm-linux-gcc LDFLAGS=-static 编译与库无关的完全独立程序
luther@gliethttp:~/lrzsz-0.12.20$ ll src/*z
-rwxr-xr-x 1 luther luther 788K 2010-05-23 09:54 src/lrz
-rwxr-xr-x 1 luther luther 781K 2010-05-23 09:54 src/lsz
拷贝到开arm发板上
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直接输入lrz回车,默认使用zmodem传输,所以这也是我们最希望的方式,因为它最快.
lrz -X 使用xmodem
lrz -Y 使用ymodem
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[root@(none) /root]#lrz --help
lrz version 0.12.20
Usage: lrz [options] [filename.if.xmodem]
Receive files with ZMODEM/YMODEM/XMODEM protocol
(X) = option applies to XMODEM only
(Y) = option applies to YMODEM only
(Z) = option applies to ZMODEM only
-+, --append append to existing files
-a, --ascii ASCII transfer (change CR/LF to LF)
-b, --binary binary transfer
-B, --bufsize N buffer N bytes (N==auto: buffer whole file)
-c, --with-crc Use 16 bit CRC (X)
-C, --allow-remote-commands allow execution of remote commands (Z)
-D, --null write all received data to /dev/null
--delay-startup N sleep N seconds before doing anything
-e, --escape Escape control characters (Z)
-E, --rename rename any files already existing
--errors N generate CRC error every N bytes (debugging)
-h, --help Help, print this usage message
-m, --min-bps N stop transmission if BPS below N
-M, --min-bps-time N for at least N seconds (default: 120)
-O, --disable-timeouts disable timeout code, wait forever for data
--o-sync open output file(s) in synchronous write mode
-p, --protect protect existing files
-q, --quiet quiet, no progress reports
-r, --resume try to resume interrupted file transfer (Z)
-R, --restricted restricted, more secure mode
-s, --stop-at {HH:MM|+N} stop transmission at HH:MM or in N seconds
-S, --timesync request remote time (twice: set local time)
--syslog[=off] turn syslog on or off, if possible
-t, --timeout N set timeout to N tenths of a second
-u, --keep-uppercase keep upper case filenames
-U, --unrestrict disable restricted mode (if allowed to)
-v, --verbose be verbose, provide debugging information
-w, --windowsize N Window is N bytes (Z)
-X --xmodem use XMODEM protocol
-y, --overwrite Yes, clobber existing file if any
--ymodem use YMODEM protocol
-Z, --zmodem use ZMODEM protocol
short options use the same arguments as the long ones