数学之路-分布式计算-linux/unix技术基础(2)

让进程在后台运行，执行命令后立即返回，可以继续执行其它命令，在命令行最后加上“&”

bash-4.2$ find ~ -name doc &
[1] 5453
bash-4.2$ /home/myhaspl/hadoop-2.4.1/share/doc
/home/myhaspl/pypy-2.3.1-src/site-packages/numpy/doc
/home/myhaspl/pypy-2.3.1-src/ctypes_configure/doc
/home/myhaspl/pypy-2.3.1-src/pypy/doc
/home/myhaspl/numpy/doc
/home/myhaspl/numpy/build/lib.linux-x86_64-2.7/numpy/doc
/home/myhaspl/numpy/numpy/doc
/home/myhaspl/numpy/numpy/numpy/doc
/home/myhaspl/numpy/numpy/numpy/f2py/doc

重定向

下面命令查找文件，并将结果列表重定向到一个文件中

bash-4.2$ find ~ -name doc >mydoclist &
[1] 5461
bash-4.2$ ls
hadoop-2.4.1 hadoop-2.4.1.tar.gz  numpy
hadoop-2.4.1-src.tar.gz  mydoclist      pypy-2.3.1-src
[1]+  完成                  find ~ -name doc > mydoclist
bash-4.2$ cat mydoclist
/home/myhaspl/hadoop-2.4.1/share/doc
/home/myhaspl/pypy-2.3.1-src/site-packages/numpy/doc
/home/myhaspl/pypy-2.3.1-src/ctypes_configure/doc
/home/myhaspl/pypy-2.3.1-src/pypy/doc
/home/myhaspl/numpy/doc
/home/myhaspl/numpy/build/lib.linux-x86_64-2.7/numpy/doc
/home/myhaspl/numpy/numpy/doc
/home/myhaspl/numpy/numpy/numpy/doc
/home/myhaspl/numpy/numpy/numpy/f2py/doc
/home/myhaspl/numpy/numpy/build/lib.linux-x86_64-2.7/numpy/doc
bash-4.2$ 

重定向增加到一个文件中,使用">>"

bash-4.2$ find ~ -name hadoop >>mydoclist &
[1] 5466

bash-4.2$ cat mydoclist
/home/myhaspl/hadoop-2.4.1/share/doc
/home/myhaspl/pypy-2.3.1-src/site-packages/numpy/doc
/home/myhaspl/pypy-2.3.1-src/ctypes_configure/doc
/home/myhaspl/pypy-2.3.1-src/pypy/doc
/home/myhaspl/numpy/doc
/home/myhaspl/numpy/build/lib.linux-x86_64-2.7/numpy/doc
/home/myhaspl/numpy/numpy/doc
/home/myhaspl/numpy/numpy/numpy/doc
/home/myhaspl/numpy/numpy/numpy/f2py/doc
/home/myhaspl/numpy/numpy/build/lib.linux-x86_64-2.7/numpy/doc
/home/myhaspl/hadoop-2.4.1/bin/hadoop
/home/myhaspl/hadoop-2.4.1/etc/hadoop
/home/myhaspl/hadoop-2.4.1/share/hadoop
/home/myhaspl/hadoop-2.4.1/share/hadoop/httpfs/tomcat/webapps/webhdfs/WEB-INF/classes/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/hadoop/httpfs/tomcat/webapps/webhdfs/WEB-INF/classes/org/apache/hadoop/lib/service/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/api/src-html/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/api/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/api/org/apache/hadoop/lib/service/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/src-html/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/src-html/org/apache/hadoop/lib/service/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/org/apache/hadoop/lib/service/hadoop

本博客所有内容是原创，如果转载请注明来源

http://blog.youkuaiyun.com/myhaspl/

使用管道“|"，将第1个命令的输出变为第2个命令的输入。

bash-4.2$ find ~ -name hadoop|grep hdfs
/home/myhaspl/hadoop-2.4.1/share/hadoop/httpfs/tomcat/webapps/webhdfs/WEB-INF/classes/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/hadoop/httpfs/tomcat/webapps/webhdfs/WEB-INF/classes/org/apache/hadoop/lib/service/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/src-html/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/src-html/org/apache/hadoop/lib/service/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/org/apache/hadoop
/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/org/apache/hadoop/lib/service/hadoop

tee命令与管道同时使用，可以在输出同时，再输出一份给管道

-bash-4.2$ ls |tee mylist
hadoop-2.4.1
hadoop-2.4.1-src.tar.gz
hadoop-2.4.1.tar.gz
mydoclist
numpy
pypy-2.3.1-src
-bash-4.2$ cat mylist
hadoop-2.4.1
hadoop-2.4.1-src.tar.gz
hadoop-2.4.1.tar.gz
mydoclist
numpy
pypy-2.3.1-src
-bash-4.2$ 

通配符(~表示当前用户的主目录)

*为多个字符,?为单个字符,

-bash-4.2$ ls ~/numpy/*.py
/home/myhaspl/numpy/pavement.py  /home/myhaspl/numpy/setupegg.py
/home/myhaspl/numpy/runtests.py  /home/myhaspl/numpy/setup.py
-bash-4.2$ ls ~/numpy/*.txt
/home/myhaspl/numpy/BENTO_BUILD.txt  /home/myhaspl/numpy/LICENSE.txt
/home/myhaspl/numpy/DEV_README.txt   /home/myhaspl/numpy/README.txt
/home/myhaspl/numpy/INSTALL.txt      /home/myhaspl/numpy/THANKS.txt
-bash-4.2$ ls ~/numpy/setup*.py
/home/myhaspl/numpy/setupegg.py  /home/myhaspl/numpy/setup.py

-bash-4.2$ ls ~/numpy/setup.??
/home/myhaspl/numpy/setup.py
-bash-4.2$