What is control file in Unix?
A run-control file is a file of declarations or commands associated with a program that it interprets on startup. If a program has site-specific configuration shared by all users at a site, it will often have a run-control file under the /etc directory.
What does $variable mean in shell script?
A variable is a character string to which we assign a value. The value assigned could be a number, text, filename, device, or any other type of data. A variable is nothing more than a pointer to the actual data. The shell enables you to create, assign, and delete variables.
How do I run a control file in Unix?
To run the control files use the following command at the prompt: [username@redstart username]$ sqlldr sxxxxxx/password, control=filename.
How do I create a CTL file?
Complete the following steps to create a new control file.
- Make a list of all datafiles and redo log files of the database.
- Shut down the database.
- Back up all datafiles and redo log files of the database.
- Start up a new instance, but do not mount or open the database: STARTUP NOMOUNT.
How do you read a variable from a file in Linux?
To read variables from a file we can use the source or . command….
- I dont want to display the variable, I want that this variable should be read by the script for further processing.
- Ok, delete echo $name .
- @user208413 The value of $name variable is the string from your file assigned using cat $file command.
How do I run a CTL file?
In Windows, you can run SQL loader from command prompt via the following ways:
- Command Line Reference. sqlldr scott/tiger@orcl data=C:\data\emp. csv control=c:\ctl\empctl. ctl log=c:\temp\sqllog.
- Using batch script. Save the above sqlldr command in the batch file with extension . bat.
How do you create a control file in Linux?
What is the use of variables in shell script?
Features of Shell Scripting: Unix Variables Shell variables provide us the ability to store and manipulate information within a shell program. In this tutorial, we return to shell scripts and understand how to work with variables. Variables are used to change the flow of the program and to maintain the state.
How do I set a variable in Bash shell?
When using csh, variables are defined using the ‘set’ command and they are exported as environment variables using the ‘setenv’ command. Along with the scalar variables described above, the bash shell supports array variables also.
Does the script file contain data at the start?
The file does contain data at the start of the script. To make things more complex, when we run this through our ERP system it runs fine, but when we run it through our cron schedule it doesn’t put anything in that variable. Show activity on this post.
What is the use of setenv in shell script?
These are the variables that are visible to the current instance of the shell. The ‘export’ command is used to expose local variables to the environment variables. When using csh, variables are defined using the ‘set’ command and they are exported as environment variables using the ‘setenv’ command.