Skip to main content

Most Common UNIX Commands Part - III

By
Continuing the unix commands left at part II, lets get to know some more unix commands

Paste- This command is used to merge lines of file of a single file or multiple files.for example if we give
paste dummy.txt. It will display contents of file similar to cat command.

$ paste dummy.txt
aaa
bbb 
ccc

 $paste -s dummy.txt
aaa bbb ccc 

-s joins all lines of file since no delimiter is specified, default delimiter tab is being used

 $paste -d, -s dummt.txt
aaa,bbb,ccc

 -d is it the delimiter option

 $ paste file1 file2 

 In here it merges both the files parallellely merged

 nslookup - This command is used to find the ip address if you know the domain name and vice versa

 $nslookup abc.com

 Name: abc.com

Address: 209.132.183.181

 $nslookup 209.132.183.181

 Name: abc.com

 finger- This command is used to know the information of a user i.e name,home directory, last logged info etc.

 finger dvader

 [mentor.cc.purdue.edu]
  Login name: dvader                      In real life: Darth Vader
  Directory: /home/mentor/d/dvader        Shell: /bin/csh
  Last login Tue Jul 17 15:21 on ttyQ7 from expert.cc.purdue.edu

  Unread mail since Wed Jul 18 13:00:54 2001

 Tr - command copies the standard input to the standard output with substitution or deletion of selected characters. I have mainly used for converting lower case to upper case vice versa

 $ echo 'linux' | tr "a-z" "A-Z"

 LINUX

 Kill- This command is used to kill a particular or any zombie process. As we know that ps command list out all the processes along with their process id's respectively. we need process id's to kill them

kill pid

Hope this article helps you in understanding unix basic commands

Comments

Post a Comment

Popular posts from this blog

Comparing Objects in Informatica

By
We might face a scenario where there may be difference between PRODUCTION v/s SIT version of code or any environment or between different folders in same environment. In here we go for comparison of objects we can compare between mappings,sessions,workflows In Designer it would be present under "Mappings" tab we can find "Compare" option. In workflow manger under "Tasks & Workfows" tab we can find "Compare" option for tasks and workflows comparison respectively. However the easiest and probably the best practice would be by doing using Repository Manager.In Repository Manager under "Edit" tab we can find "Compare" option. The advantage of using Repository manager it compares all the objects at one go i.e. workflow,session and mapping. Hence reducing the effort of individually checking the mapping and session separately. Once we select the folder and corresponding workflow we Can click compare for checking out ...
11 comments
Read more

Finding Duplicate records and Deleting Duplicate records in TERADATA

By Anonymous
Requirement: Finding duplicates and removing duplicate records by retaining original record in TERADATA Suppose I am working in an office and My boss told me to enter the details of a person who entered in to office. I have below table structure. Create Table DUP_EXAMPLE ( PERSON_NAME VARCHAR2(50), PERSON_AGE INTEGER, ADDRS VARCHAR2(150), PURPOSE VARCHAR2(250), ENTERED_DATE DATE ) If a person enters more than once then I have to insert his details more than once. First time, I inserted below records. INSERT INTO DUP_EXAMPLE VALUES('Krishna reddy','25','BANGALORE','GENERAL',TO_DATE('01-JAN-2014','DD-MON-YYYY')) INSERT INTO DUP_EXAMPLE VALUES('Anirudh Allika','25','HYDERABAD','GENERAL',TO_DATE('01-JAN-2014','DD-MON-YYYY')) INSERT INTO DUP_EXAMPLE VALUES('Ashok Vunnam','25','CHENNAI','INTERVIEW',TO_DATE('01-JAN-2014',...
2 comments
Read more

Updating Target Table in Informatica

By Anonymous
Generally, in every project we will see at least one requirement to update target based on some conditions. Case1: When we have primary key defined on table in Database Case2:   When we do not have primary key defined on table in Database Case3: When we want to update target based on non-primary key field. Let’s discuss it in detail. Case1: When we have primary key defined on table in Database After creating table in DB, import table as target along with primary key constraints. After done with importing, we can check the primary key details by editing target in target definition. In this case, we can use update strategy to update target table. Suppose, we have a table called RETURN_CD and primary key ROW_WID defined on that table. Now, we can update target table using update strategy based on primary key. In mapping, we should connect primary key port and the ports which we want to update in target table. Please check the below screenshot. And ...
Post a Comment
Read more