Ubuntu安装dos2unix命令
原因就是Windows和Linux的回车符是不同的
在Windows下回车符是rn回车换行
在Linux下回车符是n
最简单、最常用的解决方法是使用dos2unix命令转换：dos2unix filename
Ubuntu下dos2unix和unix2dos命令在tofrodos包中
安装：apt-get install tofrodos
安装完之后用dos2unix和unix2dos发现还是不能用，原来是Ubuntu10.04里已经不再用这个命令啦，
$ dpkg -L tofrodos
/.
/usr
/usr/bin
/usr/bin/fromdos
/usr/share
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/fromdos.1.gz
/usr/share/doc
/usr/share/doc/tofrodos
/usr/share/doc/tofrodos/NEWS.Debian.gz
/usr/share/doc/tofrodos/tofrodos.html
/usr/share/doc/tofrodos/copyright
/usr/share/doc/tofrodos/changelog.Debian.gz
/usr/share/doc/tofrodos/readme.txt.gz
/usr/bin/todos
/usr/share/man/man1/todos.1.gz
Tofrodos comprises one program, "fromdos" alias "todos", which converts text files to and from these formats. Use "fromdos" to convert DOS text files to the Unix format, and "todos" to convert Unix text files to the DOS format.
这里是对fromdos和todos用法的介绍。这两个命令还是比较容易记的，也好理解，更加人性化。
但是有些地方不得不用老的命令dos2unix和unix2dos，怎么办呢？以下引自一篇文章：
http://blog.csdn.net/HandonFeng/archive/2010/05/08/5569186.aspx 大家可以尝试下：
解决方案之一是下一个busybox编译，然后自己建个符号连接。
我用的是busybox1.15.2，里面包含的了这两个命令：
$ ./busybox
BusyBox v1.15.2 (2010-03-22 11:29:01 CST) multi-call binary
Copyright (C) 1998-2008 Erik Andersen, Rob Landley, Denys Vlasenko
and others. Licensed under GPLv2.
See source distribution for full notice.
Usage: busybox [function] [arguments]...
or: function [arguments]...
BusyBox is a multi-call binary that combines many common Unix
utilities into a single executable. Most people will create a
link to busybox for each function they wish to use and BusyBox
will act like whatever it was invoked as!
Currently defined functions:
[, [[, addgroup, adduser, adjtimex, ar, arp, arping, ash, awk, basename, beep, blkid,
brctl, bunzip2, bzcat, bzip2, cal, cat, catv, chat, chattr, chgrp, chmod, chown, chpasswd,
chpst, chroot, chrt, chvt, cksum, clear, cmp, comm, cp, cpio, crond, crontab, cryptpw,
cttyhack, cut, date, dc, dd, deallocvt, delgroup, deluser, depmod, devmem, df, dhcprelay,
diff, dirname, dmesg, dnsd, dnsdomainname, dos2unix, du, dumpkmap, dumpleases, echo,
ed, egrep, eject, env, envdir, envuidgid, ether-wake, expand, expr, fakeidentd, false, fbset,
fbsplash, fdflush, fdformat, fdisk, fgrep, find, findfs, fold, free, freeramdisk, fsck, fsck.minix,
fsync, ftpd, ftpget, ftpput, fuser, getopt, getty, grep, gunzip, gzip, halt, hd, hdparm, head,
hexdump, hostid, hostname, httpd, hush, hwclock, id, ifconfig, ifdown, ifenslave, ifplugd,
ifup, inetd, init, insmod, install, ionice, ip, ipaddr, ipcalc, ipcrm, ipcs, iplink, iproute, iprule,
iptunnel, kbd_mode, kill, killall, killall5, klogd, last, length, less, linux32, linux64, linuxrc, ln,
loadfont, loadkmap, logger, login, logname, logread, losetup, lpd, lpq, lpr, ls, lsattr, lsmod,
lzmacat, lzop, lzopcat, makedevs, makemime, man, md5sum, mdev, mesg, microcom,
mkdir, mkdosfs, mkfifo, mkfs.minix, mkfs.vfat, mknod, mkpasswd, mkswap, mktemp,
modprobe, more, mount, mountpoint, msh, mt, mv, nameif, nc, netstat, nice, nmeter,
nohup, nslookup, od, openvt, passwd, patch, pgrep, pidof, ping, ping6, pipe_progress,
pivot_root, pkill, popmaildir, poweroff, printenv, printf, ps, pscan, pwd, raidautorun, rdate,
rdev, readahead, readlink, readprofile, realpath, reboot, reformime, renice, reset, resize, rm,
rmdir, rmmod, route, rtcwake, run-parts, runlevel, runsv, runsvdir, rx, script, scriptreplay,
sed, sendmail, seq, setarch, setconsole, setfont, setkeycodes, setlogcons, setsid, setuidgid,
sh, sha1sum, sha256sum, sha512sum, showkey, slattach, sleep, softlimit, sort, split,
start-stop-daemon, stat, strings, stty, su, sulogin, sum, sv, svlogd, swapoff, swapon,
switch_root, sync, sysctl, syslogd, tac, tail, tar, tcpsvd, tee, telnet, telnetd, test, tftp, tftpd,
time, timeout, top, touch, tr, traceroute, true, tty, ttysize, tunctl, udhcpc, udhcpd, udpsvd,
umount, uname, uncompress, unexpand, uniq, unix2dos, unlzma, unlzop, unzip, uptime,
usleep, uudecode, uuencode, vconfig, vi, vlock, volname, watch, watchdog, wc, wget, which,
who, whoami, xargs, yes, zcat, zcip