Let me specify my case: I have a text file containing many email addresses. Now I have to read this text file and concatenate all of these email addresses into a string so that I can have a list of email addresses separated by commas. When creating a bash script, we might also be required to compare two or more strings & comparing strings can be a little tricky. echo “Concatenated string is $s3 of length $len “, concatenation is performed I am a Red Hat Certified Engineer (RHCE) and working as an IT professional since 2009.. comparing two or more numbers. 1=LX22BILN In PowerShell, string concatenation is primarily achieved by using the “+” operator. Check if Two Strings are Equal # In most cases, when comparing strings you would want to check whether the strings are equal or not. for instance, if you wanted to get the length of s3 in len, you;d do, #!/bin/sh In choosing the best method to use, consider the data types you will be working with carefully because PowerShell will treat string data and numbers very differently.. Concatenate strings: [str1 = str1 + str2] We do not need extra operater or function to use. /pbin/${8}.ksh $[1} ${2} /pswork/sp.${1}.step120.outfile ${4} ${5} ${6} To print length of string inside Bash Shell: ‘#‘ symbol is used to print the length of a string. I am looking to reverse 4 digits in a string, could you please let me know what would be syntax, and data will be 178126*****4321 , it is not a column, so it possible if we can identify the position of charcter like 12 th to 16 charecter needs to be reveresed , is it possible, if yes could you please let me know the syntax. Write a shell program to convert all the contents into the uppercase in a particular file; Write a shell script to reverse the contents of a file; Shell script to perform string replacement in a file and view the content of file; Write a menu driven shell script for Copy a file, Remove a file, Move a file We will now create a script for doing numeric comparison, but before we do that we need to know the parameters that are used to compare numerical values . Shell Scripting is an open-source computer program designed to be run by the Unix/Linux shell. Tutorial – Bash Concatenate Strings: Learn to concatenate two or more strings. Learn several ways to join multiple strings together in shell scripting... in under 90 seconds! I know it can get somewhat complicated, but when I stop to think about it, the simple task of joining strings can get really complicated. echo ${VAR1#a*c} Output: xyzabc. String variable after and before the string data. Is there a portable unix shellscripting way of joining a number of strings together with a given separator, like so: $ strjoin --- foo bar baz quux foo---bar---baz---quux Sure I could use a $ shell shell. $ str1="Hello" $ str2="World" $ str3="$str1 $str2" $ echo $str3 > Hello World Example 2: It is not required that both string should be variable, We can use one variable and other direct sting to concatenate them. Example 1: It is simply write two or more strings variable one after one for concatenating them together. compare strings in shell scripting: culin: Linux - General: 10: 01-24-2013 02:33 AM: Shell Script: Delete lines til string found or until particular string. The simplest and easy to understand way to concatenate string is writing the variables side by side. Equal. 4=22GR Because the positional position of /pswork/sp.${1}.step120.outfile is 3, it substitues BILL for ${1} If the matrix has a size m by n, so i goes from 0 to (m-1) and j from 0 to (n-1). 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