rz命令：
- (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
参数解析：
-a 表示使用ascii码格式传输文件，如果是Dos格式的文件，会转换为unix格式
-b –binary 用binary的方式上传下载，不解释字符为ascii
-e –escape 强制escape 所有控制字符，比如Ctrl+x，DEL等
-r 使用 Crash recovery mode. 即文件传输中断会重传
-y 表示文件已存在的时候会覆盖
-O (大写O)采用同步写模式，以处理从缓存写到磁盘时中断丢失的情况
--o-sync 同上
PS:通常上传比较大的文件时 用rz -be