TECH SOLUTIONS

You can remove a command from history as follows:

$history -d <offset>

For example,

$ history

1 cd /home

2 rm filename

3 ls -l

4 touch new

5 cp new new1

6 history

$ history -d 4

$ history

1 cd /home

2 rm filename

3 ls -l

4 cp new new1

5 history

6 history -d 4

7 history

Also , if you want to execute a command from history it can be executed as 

$ !<offset>

for example,

$ !3

will execute "ls -l"