Interview Questions : Unix/Linux : Part-8

1. Display all the files in current directory sorted by size?
ls -l | grep '^-' | awk '{print $5,$9}' |sort -n|awk '{print $2}'


2. Write a command to search for the file 'map' in the current directory?
find -name map -type f

3. How to display the first 10 characters from each line of a file?
cut -c -10 filename

4. Write a command to remove the first number on all lines that start with "@"?
sed '\,^@, s/[0-9][0-9]*//' < filename

How to find the product installed with IBM Infosphere Server - Version.xml

The Installed product details we can get from Version.xml file, this file contains all the information about Server Installation, version etc.

Version.xml file is existing in $ISHOME path. So

 a) cd $ISHOME
 b) If this will not work, try below steps to get the DSEngine dir
    
 Execute below command to get ..
 cd `ps -ef| grep dsrpc | grep -v grep | awk '{print $NF}' | sed 's/.\{26\}$//'`

Removing last or more character of string

Want to remove last character from a string in Linux, We can do this with help of SED commands.

Use this

a) Remove last char
sed 's/.$//' input
or
sed 's/.\{1\}$//' input

i.e. -
echo 123456 | sed 's/.$//'
12345

echo 123456 | sed  's/.\{1\}$//'
12345