Linux基本操作实验（5）

[root@windriver-machine shtest]# cat myfile
The log files have all been done
[root@windriver-machine shtest]# read -e myfile
ll
[root@windriver-machine shtest]# read -e myfile testfile

[root@windriver-machine shtest]# ls
1234 1234.txt 123abc errors ex1.sh myfile newerr output testoutput testoutput2
[root@windriver-machine shtest]# cp myfile myfile1
[root@windriver-machine shtest]# cat myfile
The log files have all been done
[root@windriver-machine shtest]# cat myfile myfile1
The log files have all been done
The log files have all been done
[root@windriver-machine shtest]# cat

[root@windriver-machine shtest]# cat -n myfile
1 The log files have all been done
[root@windriver-machine shtest]# cat -n myfile1 >myfile
myfile myfile1 myfile2
[root@windriver-machine shtest]# cat -n myfile1 >myfile3
[root@windriver-machine shtest]# cat myfile3
1 The log files have all been done
[root@windriver-machine shtest]# vi myfile1
[root@windriver-machine shtest]# cat -n myfile1
1 The log files have all been done
2
3
4 This is other line to do verify work
[root@windriver-machine shtest]# cat -b myfile1
1 The log files have all been done

2 This is other line to do verify work
[root@windriver-machine shtest]# cat myfile2
This is great
[root@windriver-machine shtest]# cat /dev/null >myfile2
[root@windriver-machine shtest]# cat myfile2
[root@windriver-machine shtest]#

【4】tee 会从标准输入设备读取数据,并将其内容输出到标准输出设备,同时保存成文件. –a 附加到现有文件中.-i 忽略中断信号.

[root@windriver-machine shtest]# cat myfile1|tee myfile1.bak1 myfile1.bak2 myfile1.bak3
The log files have all been done

This is other line to do verify work
This is tab\tcontrol
[root@windriver-machine shtest]# ll
total 52
lrwxrwxrwx 1 root root 8 2011-08-06 22:07 1234 -> 1234.txt
-rw-r--r-- 1 root root 0 2011-08-07 01:43 1234.txt
drwsr-sr-x 2 windriver windriver 4096 2011-08-06 21:24 123abc
-rw-rw-r-- 2 windriver windriver 74 2011-08-06 22:11

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