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命令参考
1000 a=1
1001 echo $a
1002 a=
1003 a="seveniruby testerhome"
1004 echo $a
1005 echo ${a}
1006 echo $a
1007 echo $ab
1008 echo ${a}b
1009 echo $PWD
1010 for((i=0; i<10; i++)); do echo $i;echo $i;done
1011 if [ -f json.schema ] ; then echo is file; else echo not file; fi
1012 ls
1013 array=(1 2 3 4 5)
1014 for f in ${array[*]}; echo $f
1015 for f in ${array[*]}; do echo $f; done
1016 ss="aa bb cc dd";for x in $ss;do echo $x ;done
1017 ss="aa bb cc dd";for x in "$ss";do echo $x ;done
1018 i=0
1019 while [ $i -lt 5 ] ; do echo $i;done
1020 while [ $i -lt 5 ] ; do echo $i; ((i=i+1)); done
1021 ls
1022 vi /tmp/file1
1023 while read line;do echo $line;done < /tmp/file1
1024 while read line;do echo will $line;done < /tmp/file1
1025 if ls dddd;then echo exist ; else not exist; fi
1026 ls ddd
1027 echo $?
1028 sleep 1
1029 sleep 2
1030 sleep 200
1031 sleep 200 &
1032 echo $!
1033 cat /tmp/file1
1034 read x < /tmp/file1
1035 echo $x
1036 read x
1037 read line < /tmp/file1
1038 echo $line
1039 echo testerhome > /tmp/file2
1040 cat /tmp/file2
1041 echo testerhome >> /tmp/file2
1042 cat /tmp/file2
1043 echo testerhome > /tmp/file2
1044 cat /tmp/file2
1045 echo testerhome
1046 printf "xxx"
1047 echo xxx
1048 cat /tmp/file2
1049 printf "xxxxx" >> /tmp/file2
1050 cat /tmp/file2
1051 printf "ddddddd" >> /tmp/file2
1052 cat /tmp/file2
1053 grep
1054 grep "s*"
1055 echo "ddddddssssssddddddd"
1056 echo "ddddddssssssddddddd" | grep s*
1057 cat /tmp/file2
1058 cat /tmp/file2 | grep ddddd
1059 ls *
1060 echo *
1061 echo ?
1062 echo ??????
1063 cat /tmp/file2 | grep ddddd
1064 find_ddd() { cat /tmp/file2 | grep ddddd ; }
1065 find_ddd
1066 find_ddd() { cat /tmp/file2 | grep $1 ; }
1067 find_ddd
1068 find_ddd ddddd
1069 find_ddd xx
1070 find_ddd() { cat $2 | grep $1 ; }
1071 find_ddd x /tmp/file2
1072 find_ddd dd /tmp/file2
1073 find_ddd dd /tmp/file1
1074 find_ddd d /tmp/file1
1075 vi /tmp/1.sh
1076 bash /tmp/1.sh
1077 sh /tmp/1.sh
1078 /tmp/1.sh
1079 chmod +x /tmp/1.sh
1080 /tmp/1.sh
1081 echo PATH
1082 echo $PATH
1083 ls
1084 which ls
1085 /usr/bin/ls
1086 1.sh
1087 export PATH=$PATH:/tmp/
1088 1.sh
1089 vi /tmp/1.sh
1090 1.sh ddd
1091 1.sh x
1092 vi /tmp/1.sh
1093 1.sh x
1094 1.sh ddd
1095 vi /tmp/1.sh
1096 echo $a
1097 a=""
1098 echo $a
1099 1.sh ddd
1100 echo $a
1101 1.sh ddd
1102 vi /tmp/1.sh
1103 1.sh ddd
1104 echo $a
1105 source /tmp/1.sh
1106 source /tmp/1.sh ddd
1107 echo $a
1108 bash /tmp/1.sh ddd
1109 /tmp/1.sh ddd
1110 source /tmp/1.sh ddd
1111 echo $a
1112 ff
1113 ff ddd
1114 . /tmp/1.sh ddd
1115 bash -x /tmp/1.sh
1116 bash -x /tmp/1.sh ddd
1117 echo $PATH
1118 export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
1119 vi ~/.bash_profile
1120 ls
1121 pwd
1122 curl http://www.baidu.com
1123 curl http://www.baidu.com > /tmp/index.html
1124 cd /tmp/
1125 python -m CGIHTTPServer
作业
写一个脚本，第一个参数为目录名，然后遍历目录内所有的文件， 打印每个文件是否是目录还是文件的提示输出。