The easiest way to replace white spaces with underscores in bash

Question

recently I had to write a little script that parsed VMs in XenServer and as the names of the VMs are mostly with white spaces in e g Windows XP or Windows Server 2008  I had to trim those white spaces and replace them with underscores     I found a simple solution to do this using sed which is great tool when it comes to string manipulation  echo  quot This is just a test quot    sed -e  s     g   returns This is just a test  Are there other ways to accomplish this

User · Accepted Answer

You can do it using only the shell  no need for tr or sed    str  This is just a test    echo   str       This is just a test

User · Answer

This is borderline programming  but look into using tr     echo  this is just a test    tr -s       tr           Should do it  The first invocation squeezes the spaces down  the second replaces with underscore  You probably need to add TABs and other whitespace characters  this is for spaces only

[bash] The easiest way to replace white spaces with (underscores) _ in bash

Examples related to bash

Examples related to sed