#Read this number of lines into history buffer on startup. export HISTSIZE=1000000
#`HISTFILESIZE` is usually set after bash reads the history file (which is #done after reading any configs like `.bashrc`). If it is unset at this point, #it is set to the same value as `HISTSIZE`. Therefore we must set it to `NIL`, #in which case it isn't "unset", but doesn't have a value either, enabling us #to keep an unlimited history. export HISTFILESIZE=""
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