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UGU: Unix Guru Universe - Unix Tip #4567- September 12, 2025
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Unix Tip #4567- September 12, 2025
SEPARATE SHELL COMMAND HISTORY FILES
In any X based desktop when the number of pseudo terminal
windows are more then one, the common shell history
file (KSH) becomes a nuisance. Here is a way to have
separate, safe and limited shell command history files.
Put the following code in your shell RC file.
--------------------------------CODE START------------------------------------
# Form a unique name for the shell history file using the tty output and
# set the shell variable HISTFILE to point to that
# This solves the problem of mutiple shells using the same history file
# and causing the confusion....
histf=`tty | awk 'BEGIN {FS="/"; nm=".shist_"} { for (i=1; i<=NF; i++) nm = nm
$i;} END { print nm;} '`
export HISTFILE=$histf
m -f $histf
echo History file is $histf...
--------------------------------CODE END------------------------------------
This tip generously supported by: atulk@informix.com
NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted
by various unix admins around the globe. UGU suggest you read and
test each tip in a non-volitile environment before placing into
production.
LAST 5 TIPS
4566
- SHARING STDIN/STDOUT ON 2 TERMINALS
4565
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4564
- MULTI-SYSADMIN MONITORING
4563
- ABBREVIATE IN VI
4562
- BACKUP CRITICAL SYSTEM FILES
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