11.1 Shell Script Basics(Shell 脚本基础) Bourne shell scripts generally start with the following line, which indicates that the /bin/sh program should execute the commands in the script file. (Make sure that no whitespace appears at the beginning of the script file.) Bourne shell 脚本一般以下...
1.用Shell编程,判断一文件是不是字符设备文件,如果是将其拷贝到 /dev 目录下。 参考程序: #!/bin/sh FILENAME= echo “Input file name:” read FILENAME if [ -c"$FILENAME" ] then cp $FILENAME /dev fi 2.设计一个shell程序,添加一个新组为class1,然后添加属于这个组的30个用户,用户名的形式为...
Examples of suitable shell scripts are given here. You can tailor these to your needs and use them to start the queue manager under the control of your HA cluster. The following shell script is an example of how to switch from the HA cluster user to the mqm user so that the queue ...
If you can enter commands into the shell, you can write shell scripts (also known as Bourne shell scripts). A shell script is a series of commands written in a ...
Putting it all together, you get something like “ls tried to open /dsafsda but couldn’t because it doesn’t exist.” This may seem obvious, but these messages can get a little confusing when you run a shell script that includes an erroneous command under a different name. ...
exec_sql.sh. As mentioned earlier, it is possible to query the database from a shell script provided the user has access to sqlplus. The following example returns a (space-delimited) list of machines that are currently maintaining sessions in the database:...
linux shell 学习笔记--内部命令学习 1.基本命令 新手必须要掌握的初级命令ls基本的列出所有文件的命令.但是往往就是因为这个命令太简单,所以我们总是低估它.比如 ,用-R 选项,这是递归选项,ls将会以目录树的形式列出所有文件, 另一个很有用的选项 是-S ,将会按照文件尺寸列出所有文件, -t, 将会按照修改时间来...
Shell是核心程序Kernel之外的命令解析器,是一个程序,也是一种命令语言和程序设计语言。作为一种命令语言,它可以交互式解析用户输入的命令。作为一种程序设计语言,它定义了各种参数,并且提供了高级语言才有的程序控制结构,虽然它不是Linux核心系统的一部分,但是它调用了Linux核心的大部分功能来执行程序建立文件,并且通过...
第3篇Shell编程实战,主要介绍Shell脚本调试技术和2个综合案例的实现。 《ARM嵌入式Linux系统开发详解(第3版)》是获得大量读者好评的“Linux典藏大系”中的《ARM嵌入式Linux系统开发详解》的第3版。 本书由浅入深,全面、系统地介绍基于ARM体系结构的嵌入式Linux系统开发涉及的方方面面知识,并给出53个典型实例和5个...
(Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat12# | | | | |13# * * * * * user-name command to be executed复制代码SHELL=/bin/bashPATH=/sbin:/bin:/usr/sbin:/usr/binMAILTO=rootHOME=/# For details see man 4 crontabs# Example of job definition:# .--- minute (0 - 59)#...