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Top Forums UNIX for Advanced & Expert Users Shell script to get one column value(s) Post 302967390 by nvkuriseti on Tuesday 23rd of February 2016 10:32:04 AM
Old 02-23-2016
Wrench Shell script to get one column value(s)

Hello Gurus,

I have limited experience in writing UNIX scripting. Have business requirement to get one column data from a file. My file format is,

Code:
FileName: /root/dir1/scripts/DSList.txt

colA | colB
SEQ_A | JOB_1a
SEQ_B | JOB_1b
SEQ_B | JOB_2b
SEQ_B | JOB_3b
SEQ_C | JOB_1c

From above format, read the file where colA = ${variable_name} then get colB values display one-by-one using FOR loop.

Please advise me how to write for loop by checking the first field with a variable name.

Thanks in advance.

- Venkat

Last edited by nvkuriseti; 02-23-2016 at 12:00 PM..
 

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break(1)                                                           User Commands                                                          break(1)

NAME
break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until loop SYNOPSIS
sh break [n] continue [n] csh break continue ksh *break [n] *continue [n] DESCRIPTION
sh The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels. The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop. csh The break utility resumes execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line. The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop. ksh The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified, then break n levels. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be exited. The continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n- th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera- tion are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), exit(1), ksh(1), sh( 1), attributes(5) SunOS 5.10 17 Jul 2002 break(1)
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