我的脚本文件例

###############################################
greeting="hello world"
i=1;
while test $i -1e 100; do
    case $i in
          *0) echo "***************">file$i;
          *) echo $i>file$i;;
    esac
   i='expr $i+1'
done
##################################################
case $# in
   1)  cat>>$1;;
   2)  cat<$1>>$2;;
   *) echo "usage:append[from] to" ;;
esac
#chmod +x myappend
#myappend file1 file2
######################################################
#下面程序实现scan:扫描当前目录下的每一个子目录,并执行用户提交的命令:
d='pwd'
for i in *
do
     if test -d $d/$i
       then
         cd $d/$i
         while echo "$i"
             trap exit 2
             read x
         do trap : 2; eval $x;
         done
     fi
done
########################################################
#下面程序dircmp测试当前目录与指定目录是否含有相同文件数
if test $ -ne 1 then
    echo "Usage:dircmp dirname"
    exit 1;
else if test !-d $1
    echo "\"$1\" is not adirectory"
    exit 1
   else
      this='ls -l|grep '^-'|wc -l'
      that='ls -l $1|grep '^-'|wc -l'
      if test $this -ne $that then
          echo "Current directory and \"$1\" do not match"
      else
          echo "Current dirctory and \"$1\" have same number of files"
      fi
    fi
fi
#dircmp abc
# "abc" is not a directory
###########################################################
# .bashrc

# User specific aliases and functions

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

# Source global definitions
if [ -f /etc/bashrc ]; then
 . /etc/bashrc
fi
#############################################################
#.bash_profile
#Get the aliases and functions
if [ -f ~/.bashrc ]
then
. ~/.bashrc
fi
#User specific environment and startup programs
#将我们bin目录($home/bin)和当前路径的当前目录加入到环境变量PATH中

PATH=.:$HOME/bin:$PATH
export PATH
#设置环境变量LOGNAME
LOGNAME=$(logname)
export LOGNAME

#设置一个快捷变量
HOST=$(hostname)
export HOST

#设置文件权限的默认umask,umask在创建文件时用来设置文件的默认访问权限
umask 022

#取消对ctrl+d按件的响应,按下ctrl+d后不注消
set -o ignoreeof

#设置默认的编辑器
EDITOR=/usr/bin/vi

#设置MAIL环境变量,当有邮件的时候shell可以通知我们
#MAIL
MAIL=/usr/spool/mail/$LOGNAME
export MAIL

#设置有主机名的提示符
case $LOGNAME in
   root) PS1="$HOST #";;
   *) PS1="$HOST $";;
esac
PS2='You need to finish inputting . . .'
#定义一些命令的别名
alias cls='clear'
alias dir='ls'
alias copy='cp'
alias rename='mv'
alias md='mkdir'
alias rd='rmdir'
alias deltree='rm -rf'
################################################
objects=*.o
objects :=$(wildcard*.o)
objects :=$(patsubst %.c,%.o,$(wildcard*.c)

foo : $(objects)
     cc -o foo $(objects)
phony target(哑/假目标):不对应实际的文件,只是一个目标
.PHONY:clean #如果这行不加,若当前目录下有个clean文件,则make clean 没有动作
clean:      #这是phony target
 rm *.o temp