能帮我看下这个脚本么？

ttphc

写了一个简单的查看用户登陆的脚本，命名为who.sh 放到root目录下，给了755的权限，运行sh who.sh
但是就是不通过啊，我的linux是redhat的A4的，哪位高手帮我调试下啊？是什么原因啊?运行的异常：
# sh who.sh
: command not found
: No such file or directoryho
: No such file or directory
: No such file or directory
: No such file or directoryc
: No such file or directory
: command not found
: No such file or directoryho
: No such file or directory
: No such file or directory
: command not found


脚本

#!/bin/sh
# Purpose: this simple script uses the common Linux
# utilities to determine the total and unique number
# of users logged on the system
# Version unimas 1.0

WHO=/usr/bin/who
GREP=/bin/grep
AWK=/bin/awk
SORT=/bin/sort
WC=/usr/bin/wc
SED=/bin/sed
echo -n "Total unique users:"
# Filter the output of the who command using awk to
# extract the first column and then uniquely sort the columns using sort.
# Pipe the sorted output to wc for line count. Finally remove unnecessary white spaces form the output of wc using sed
$WHO | $AWK '{print $1}' | $SORT -u | $WC -l | $SED 's/ */ /g';
# Use grep to filter the output of the who command to
# find the line containing user count.
# then print out the user count using awk
$WHO -q |$GREP users | $AWK 'BEGIN{FS="=";}{printf("\nTotal user sessions: %d\n\n",$2);}';
#Exit
exit 0;

零二年的夏天

我觉得如果你一定要用这种方式运行shell，可以把$部分放到eval里。

ttphc

这个是从一个网站上看到，原来的作者就是这么用的，但是不知道为什么，我这里就是不行啊！
楼上的能给个具体的解决方法么？

零二年的夏天

尝试：

1. 
   
2. sh -x who.sh

复制代码

ttphc

sh -x who.sh
+ $'\r'
: command not found
+ WHO=$'/usr/bin/who\r'
+ GREP=$'/bin/grep\r'
+ AWK=$'/bin/awk\r'
+ SORT=$'/bin/sort\r'
+ WC=$'/usr/bin/wc\r'
+ SED=$'/bin/sed\r'
' echo -n 'Total unique users:
+ $'/usr/bin/who\r'
: No such file or directoryho
+ $'/bin/awk\r' '{print $1}'
: No such file or directory
+ $'/bin/sort\r' -u
: No such file or directory
+ $'/usr/bin/wc\r' -l
+ $'/bin/sed\r' 's/ */ /g'
: No such file or directory
: No such file or directoryc
+ $'\r'
: command not found
+ $'/usr/bin/who\r' -q
: No such file or directoryho
+ $'/bin/grep\r' users
: No such file or directory
+ $'/bin/awk\r' 'BEGIN{FS="=";}{printf("\nTotal user sessions: %d\n\n",$2);}'
: No such file or directory
+ $'\r'
: command not found
+ exit 0

零二年的夏天

你运行个

1. 
   
2. dos2unix who.sh

复制代码

再看。

ttphc

# dos2unix who.sh
dos2unix: converting file who.sh to UNIX format ...


老大这个命令什么意思啊？