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Top Forums UNIX for Beginners Questions & Answers Compare two files, if the columns are same then replace next column with some value Post 303045714 by looty on Friday 10th of April 2020 09:29:49 AM
Old 04-10-2020
Compare two files, if the columns are same then replace next column with some value

Hi Team,

As i'm new to the shell scripting, i stuck in a place to replace a column valuein a file when compared with other file. Could you please help me to work on this?
I have 2 files test1.csv and test2.csv. I need to replace empdep column in test1.csv if it has the value as "sign*". I have second file test2.csv which have the value need to replace that" sign*".

Note : I'm using ksh and test1.csv have around 2,048,576 rows and test2.csv have 10000 rows

test1.csv
Code:
empname,place,empdep
aaaa ,city1,001
bbbb,city2,sign-1
dddd,city1,005
ffff,city5,sign-2
hhhh,city7,sign-1

test2.csv
Code:
empname ,new
aaaa ,001 
bbbb,002
cccc,003
dddd ,005
eeee,006
ffff,007
gggg,008
hhhh,009

Expected Result:
Code:
empname,place,empdep
aaaa ,city1,001
bbbb,city2,002
dddd,city1,005
ffff,city5,007
hhhh,city7,009

Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 04-10-2020 at 10:58 AM.. Reason: code tags, please!
 

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CGEXEC(1)							 libcgroup Manual							 CGEXEC(1)

NAME
cgexec - run the task in given control groups SYNOPSIS
cgexec [-h] [-g <controllers>:<path>] [--sticky] command [arguments] DESCRIPTION
The cgexec program executes the task command with arguments arguments in the given control groups. -g <controllers>:<path> defines the control groups in which the task will be run. controllers is a list of controllers and path is the relative path to control groups in the given controllers list. This flag can be used multiple times to define multiple pairs of lists of controllers and relative paths. Instead of the list of all mounted controllers, the wildcard b"*b" can be used. If this option is not used, cgexec will automatically place the task in the right cgroup based on /etc/cgrules.conf. If /etc/cgrules.conf configuration file is used, there can be used template names. Then the control group name contains a template in destination tag (see cgrules.conf (5)) and if the cgroup does not exist in execution time, it is created, based on /etc/cgcon- fig.conf specification. If the specifications are not present the group is created with the default kernel values. -h, --help Display this help and exit. --sticky If running the task command with this option, the daemon of service cgred (cgrulesengd process) does not change both the task of the command and the child tasks. Without this option, the daemon does not change the task of the command but it changes the child tasks to the right cgroup based on /etc/cgrules.conf automatically. EXAMPLES
cgexec -g *:test1 ls runs command ls in control group test1 in all mounted controllers. cgexec -g cpu,memory:test1 ls -l runs command ls -l in control group test1 in controllers cpu and memory. cgexec -g cpu,memory:test1 -g swap:test2 ls -l runs command ls -l in control group test1 in controllers cpu and memory and control group test2 in controller swap. ENVIRONMENT VARIABLES
CGROUP_LOGLEVEL controls verbosity of the tool. Allowed values are DEBUG, INFO, WARNING or ERROR. FILES
/etc/cgrules.conf default libcgroup configuration file SEE ALSO
cgrules.conf (5) Linux 2009-03-15 CGEXEC(1)
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