nixCraft

It is really, a simple job, all you have to do is type history command to display the history of commands:

Hope this helps some newbie out there

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#history

is the command to see all the commands enter by the terminal

it is stored in

/root/.bash_history file
for user root

and similarly for other users
in their home directory

keep in mind that smart user can delete history file or just link it back to /dev/null, a better way is to configure process and command auditing

How to keep a detailed audit trail of what’s being done on your Linux systems

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May the force with you!

joe@localpub# cat >> .bashrc << EOF
EXPORT REMP="ping -c 10 IP.ADD.RE.SS"
EOF
joe@localpub# source .bashrc

i grep from the ICMP/IPtables log who has pinged me 10 times. i dont even appear in your .bash_history or parse the ping -c 10 IP.ADD.RE.SS from egress traffic log at startup/shutdown. now you audit. :-p

also you can use
#history | more

Yes i'm going to audit you. I don't think so your command going to run. You are just creating a variable and that too with capital EXPORT which will result into an error:
If you replace with following, it will just export REMP but it will not ping anywhere
and whe your command get executed it will get audited 100% here is output:
Audited event

__________________
May the force with you!