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on 18-Apr-2019 (Thu)

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Flashcard 3980126457100

Tags
#bash #unix
Question
Bash. Disable saving history
Answer
set +o history


statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill
Second terminal without history - Unix & Linux Stack Exchange
gelink] billyocean billyocean 283 add a comment | 2 Answers 2 active oldest votes 8 Depends on the shell. In Bash, you can control the history in a couple of ways : Disable saving history using <span>set +o history and re-enable it with set -o history (note the inverted plus and minus). With history disabled, commands entered will not be saved in the history log, but previous ones will be availabl







Flashcard 3980128816396

Tags
#unix
Question
Bash. Enable saving history
Answer
set -o history


statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill
Second terminal without history - Unix &amp; Linux Stack Exchange
gelink] billyocean billyocean 283 add a comment | 2 Answers 2 active oldest votes 8 Depends on the shell. In Bash, you can control the history in a couple of ways : Disable saving history using <span>set +o history and re-enable it with set -o history (note the inverted plus and minus). With history disabled, commands entered will not be saved in the history log, but previous ones will be availabl







Flashcard 3980131175692

Tags
#bash #unix
Question
Set the file used to save the history
Answer

by setting HISTFILE (HISTFILE=~/somehistoryfile). You can disable it completely by unsetting the variable with unset HISTFILE.

If you disable the history file, you still have access to run-time history while the shell is running.

You can also set HISTFILESIZE to control the amount of commands saved in the file.


statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill
Second terminal without history - Unix &amp; Linux Stack Exchange
ory (note the inverted plus and minus). With history disabled, commands entered will not be saved in the history log, but previous ones will be available. Set the file used to save the history, <span>by setting HISTFILE (HISTFILE=~/somehistoryfile). You can disable it completely by unsetting the variable with unset HISTFILE. If you disable the history file, you still have access to run-time history while the shell is running. You can also set HISTFILESIZE to control the amount of commands saved in the file. Prevent saving certain commands in the history by using HISTCONTROL and/or HISTIGNORE . Setting HISTCONTROL to ignorespace will tell the shell to not save command lines starting with a







Flashcard 3980133534988

Tags
#bash #unix
Question
Prevent saving certain commands in the history
Answer

by using HISTCONTROL and/or HISTIGNORE.

Setting HISTCONTROL to ignorespace will tell the shell to not save command lines starting with a space.

HISTIGNORE can contain patterns of commands not to save in the history. e.g. HISTIGNORE='ls:ls *' would prevent saving lines that contain only ls or ls, a space and anything after that.


statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill
Second terminal without history - Unix &amp; Linux Stack Exchange
ill have access to run-time history while the shell is running. You can also set HISTFILESIZE to control the amount of commands saved in the file. Prevent saving certain commands in the history <span>by using HISTCONTROL and/or HISTIGNORE . Setting HISTCONTROL to ignorespace will tell the shell to not save command lines starting with a space. HISTIGNORE can contain patterns of commands not to save in the history. e.g. HISTIGNORE='ls:ls *' would prevent saving lines that contain only ls or ls, a space and anything after that. For an "amnesiac" shell, you would need to apply one of those settings either manually when opening the shell, or set them in some shell startup script. One option would be to create, s







Flashcard 3980140350732

Tags
#bash #unix
Question
Reload history
Answer
history -r


statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill
Someday Never Comes: Share your Bash history across terminals in Terminator
ng shell do not see this history. This is because the history is loaded only at the beginning of a new session. The only thing left is to manually force a reload of the history with the command <span>history -r Done. We have now access to other shells history. The last question: why don't we add the reload of the history directly in the PROMPT_COMMAND variable? Because you probably don't want







Flashcard 3980143234316

Tags
#bash #unix
Question
Flush the history to file every time we see a new command prompt.
Answer
history -a


statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill
Someday Never Comes: Share your Bash history across terminals in Terminator
nfiguration files, .bashrc for instance. #save history after every command #use 'history -r' to reload history PROMPT_COMMAND="history -a ; $PROMPT_COMMAND" What we are saying here is to invoke <span>history -a with every new command prompt line. This flush the history to file every time we see a new command prompt. You can verify this if you monitory you .bash_history file. Have we reached wh