Sponsored Content
Top Forums Shell Programming and Scripting Shell script use two variable in for loop Post 303027581 by Anil on Wednesday 19th of December 2018 12:12:53 PM
Old 12-19-2018
Shell script use two variable in for loop

I want to create a shell script to add a user and modify its comment field mentioned in a file.

1.
File value:-
Code:
 username       comment field value

xyz123            xyztesting
abc123            abctesting
def123            deftesting


2. i am using below loop to create user corresponding to comment field mentioned in file:-


Code:
for i in `cat y | awk '{ print $2 }'`, j in `cat y | awk '{print $1}'`; do echo "useradd $j  -c "\""$i"\""";done


3. Please suggest or modify this loop to get below desired output

Code:
useradd  xyz123  -c  "xyztesting"
useradd  abc123  -c   "abctesting"
 useradd  def123   -c   "deftesting"




Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!

Last edited by RudiC; 12-19-2018 at 02:01 PM.. Reason: Added CODE tags.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Passing a variable to awk while in a shell for loop

I am a newbie to awk and c programming, however am not a unix newbie. However, I do need help with a kshell script I am writing. It is almost complete, the last step is killing me. Any help would be greatly appreciated. What I am trying to do is cat a text file that has usernames. Then, using... (2 Replies)
Discussion started by: synergy_texas
2 Replies

2. Shell Programming and Scripting

Shell script / Grep / Awk to variable and Loop

Hi, I have a text file with data in that I wish to extract, assign to a variable and process through a loop. Kind of the process that I am after: 1: Grep the text file for the values. Currently using: cat /root/test.txt | grep TESTING= | awk -F"=" '{ a = $2 } {print a}' | sort -u ... (0 Replies)
Discussion started by: Spoonless
0 Replies

3. Shell Programming and Scripting

How to give a variable output name in a shell script inside a for loop

Hi all I run my program prog.c in the following way : $ ./prog 1 > output.txt where 1 is a user defined initial value used by the program. But now I want to run it for many a thousand initial values, 1-1000, and store all the outputs in different files. Like $ ./prog 1... (1 Reply)
Discussion started by: alice06
1 Replies

4. Shell Programming and Scripting

Bourne Shell - Problem with while loop variable scope.

Hello I am having issues with a script I'm working on developing on a Solaris machine. The script is intended to find out how many times a particular user (by given userid) has logged into the local system for more than one hour today. Here is my while loop: last $user | grep -v 'sshd'... (7 Replies)
Discussion started by: DaveRich
7 Replies

5. Shell Programming and Scripting

Setting a variable in a while loop (.ksh script)

Hello Everyone, I'm still trying to grasp many concepts in .ksh scripting, one of them being variables inside loops. My problem is the following: * I'm trying to set a variable inside a while read loop to reuse it outside of said loop. My lines are the following :... (13 Replies)
Discussion started by: jimmy75_13
13 Replies

6. Shell Programming and Scripting

[SHELL: /bin/sh] For loop using variable variable names

Simple enough problem I think, I just can't seem to get it right. The below doesn't work as intended, it's just a function defined in a much larger script: CheckValues() { for field in \ Group_ID \ Group_Title \ Rule_ID \ Rule_Severity \ ... (2 Replies)
Discussion started by: Vryali
2 Replies

7. Shell Programming and Scripting

Does a variable lose its value outside the loop in shell script?

hi, when we assign a variable inside a for loop or while loop in a shell script, does it loses its value after comming out of the loop. i am facing this issue. can anyone help me?? (8 Replies)
Discussion started by: Little
8 Replies

8. Shell Programming and Scripting

Unable to pass shell script variable to awk command in same shell script

I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist. diff=$1$2.diff id=$2 new=new_$diff echo "My id is $1" echo "I want to sync for user account $id" ##awk command I am using is as below cat $diff | awk... (2 Replies)
Discussion started by: Ashunayak
2 Replies

9. UNIX for Beginners Questions & Answers

How can I assign awk's variable to shell script's variable?

I have the following script, and I want to assign the output ($10 and $5) from awk to N and L: grdinfo data.grd | awk '{print $10,$5}'| read N L output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies

10. UNIX for Beginners Questions & Answers

How to write a Boolean variable which succeed and failed inside the if loop in shell script ?

I have if loop with multiple variable value check in if loop. How can i print only if loop satisfied variable and its value in shell script ? I dont want to check each variable in if loop. That makes my script larger. if ] then echo "Only satisfied variable with value" ... (3 Replies)
Discussion started by: prince1987
3 Replies
SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-f] [-q] [-t] [file] DESCRIPTION
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Options: -a Append the output to file or typescript, retaining the prior contents. -f Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super- vise real-time what is being done using `cat foo'. -q Be quiet. -t Output timeing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), replay(1). HISTORY
The script command appeared in 3.0BSD. BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. Linux July 30, 2000 Linux
All times are GMT -4. The time now is 01:16 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy