It's sometimes useful when using the linux command line to prevent things to go into the bash history; for example if you're using curl to download a file while providing your username password.
This can be easily done in linux by configuring the HISTCONTROL variable in either your ~/.bashrc (which I recommend in order to have it permanently in your bash sessions) or by just changing the value for your current session.
Either way either set the variable as follows on your ~/.bashrc or on your current session
HISTCONTROL=ignorespace
If you took the ~/.bashrc approach don't forget to source it to have i
Once this is done commands that you start with a white space will be ignored :
[root@myserver] curl -o strx25.tar.bz2 --user user:password http://www.openss7.org/repos/tarballs/strx25-0.9.2.1.tar.bz2
note the whitespace before the curl command
Removing a specific line from history
Now if you have to remove a specific line from history this is done in 2 steps
Display commands in history :
[root@myserver]history 832 docker images 833 docker rmi 0d22948b5794 834 docker images 835 docker rmi 1a31905bb4e4 836 docker build -t dse/docker . 837 docker images 838 docker rmi 47a8395f9714 839 docker build -t dse/docker . 840 docker images 841 docker rmi fe7a4702bf61 842 docker ps 843 docker ps -a 844 docker rm e3f7c83390ee 845 docker rmi fe7a4702bf61 846 docker build -t dse/docker . 847 docker images 848 docker rmi a386794cb70c
Once you identified the culprit; delete it with the following command (for example here the line 845):
history -d 845
