trim command in unix shell script

In Linux/Unix, some programs are command-line or service programs. Generally, there is a configuration file to describe their running rules. These rules are usually stored in the database, maintained by other applications. This involves a question:

[Origin] Daemon in linuxUnix is known to all. for example, httpd and MySQLd are commonly used, which are programs running in the resident memory, similar to services in Windows. Generally, the daemon processes are written using CC ++, that is, the

Redis shell command Daquan (go fromhttp://blog.mkfree.com/posts/5105432f975ad0eb7d135964） OYHK 2013-1-28 3:11:35 0 Reviews 783 views APPEND key value appends a value to the keyAUTH Password Authentication Serverbgrewriteaof

Recently, the Linux batch execution of the script is very interested in looking around the Internet for expect batch execution script, today to share a batch password modification script. Script content: Copy Code code as follows: #!/

Use PHP and Shell to write Hadoop MapReduce programs. So that any executable program supporting standard I/O (stdin, stdout) can become hadoop er or reducer. For example, copy the code as follows: hadoopjarhadoop-streaming.jar-input makes any

Hadoop itself is written in Java. Therefore, writing mapreduce to hadoop naturally reminds people of Java. However, Hadoop has a contrib called hadoopstreaming, which is a small tool that provides streaming support for hadoop so that any executable

So that any executable program supporting standard I/O (stdin, stdout) can become hadoop er or reducer. For example:Copy codeThe Code is as follows:Hadoop jar hadoop-streaming.jar-input SOME_INPUT_DIR_OR_FILE-output

1, before using expect, need to install two RPM package, The code is as follows Copy Code # RPM-IHV expect-5.43.0-8.el5.i386.rpm# RPM-IHV expect-devel-5.43.0-8.el5.i386.rpm 2, the batch modifies the password

Http://cloud.csdn.net/a/20120321/313378.html Linux Command Line skills | 10540 views | [18 comments] comments Source: linuxstall.com | Author: chankey Pathak | add to my favorites I will share with you some tips on how to learn Linux Command

Enables any executable program that supports standard IO (stdin, stdout) to be the mapper or reducer of Hadoop. For example: Copy CodeThe code is as follows: Hadoop jar Hadoop-streaming.jar-input Some_input_dir_or_file-output Some_output_dir-mapper/