Q:Is it possible to avoid commands getting stored in history in Linux?
A:Yes, you can do so in bash shell using the below method
In bash there is a variable HISTCONTROLwhich can be used to achieve our task. By default it contains a value of "ignoredups" as per which history command avoids keeping duplicate command records.
Let us change it to something else
Let us verify if the value is changed
Now as per this any command you run starting with a space will not be monitored or stored in history or and file defined under HISTFILE which by default is ~/.bash_history.
Let us try to run some commands with a space
Output of history before running command
Verify your results
Making the changes permanent
Now the variable change made is temporary and terminal based which means next time you login the HISTCONTROL variable will return to its default value.
To make it permanent follow the below link
How to set environment (PATH) variable permanently in Linux
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A:Yes, you can do so in bash shell using the below method
In bash there is a variable HISTCONTROLwhich can be used to achieve our task. By default it contains a value of "ignoredups" as per which history command avoids keeping duplicate command records.
Let us change it to something else
# export HISTCONTROL=ignorespaceLet us verify if the value is changed
# echo $HISTCONTROL
ignorespaceNow as per this any command you run starting with a space will not be monitored or stored in history or and file defined under HISTFILE which by default is ~/.bash_history.
Let us try to run some commands with a space
Output of history before running command
# history | tail -5
412 echo $HISTCONTROL
413 cd /etc/httpd/conf
414 vi httpd.conf
415 /etc/init.d/httpd status
416 history | tail -5Run any command starting with an extra space
# dateVerify your results
# history | tail -5
413 cd /etc/httpd/conf
414 vi httpd.conf
415 /etc/init.d/httpd status
416 history | tail -5
417 history | tail -5So as you see the date command executed is not stored.
Making the changes permanent
Now the variable change made is temporary and terminal based which means next time you login the HISTCONTROL variable will return to its default value.
To make it permanent follow the below link
How to set environment (PATH) variable permanently in Linux
Related Articles
View the history of commands along with time
Long list the files on the basis of time
Follow the below links for more tutorials
What is the difference/comparison between Unix and Linux ?What are the maximum and minimum limits for RHEL 4 vs 5 vs 6 ?
Step by Step Linux Boot Process Explained In Detail
What is the difference between ext3 and ext4 filesystem in Linux ?
How to configure Private Network in VMware Workstation
10 examples to help you understand top command usage in Unix/Linux
Configure Red Hat Cluster using VMware, Quorum Disk, GFS2, Openfiler
Tutorial for Monitoring Tools SAR and KSAR with examples in Linux
15 tips to enhance security of your Linux machine
Why is Linux more secure than windows and any other OS
Understanding Load Average in Linux and when to be worried about it?
RAID levels 0, 1, 2, 3, 4, 5, 6, 0+1, 1+0 features explained in detail
Understanding UMASK value in Linux
How to keep a track of all the commands run by any user in Linux
How do you check Linux machine is Physical or Virtual remotely?
How to configure PXE boot server in Linux using Red Hat 6