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Alias

Command to set alias

alias viewtest="head -10 test.log"

alias name : viewtest
cmd : "head -10 test.log"

When we use alias viewtest, head -10 test.log will be executed.

alias -p or alias will list down all the available aliases.
alias -p | grep viewtest or alias viewtest to list down specific alias

.bashrc or .bash_profile can be used permanently set the aliases.