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Code Block
cat <<EOF >> /etc/bash.bashrc
HISTTIMEFORMAT="%Y-%m-%d %T "
HISTSIZE=20000
HISTCONTROL=ignoredups:erasedups
shopt -s histappend
EOF

grub timouts

Code Block
vi /etc/default/grub
# update GRUB_TIMEOUT=3
# add GRUB_RECORDFAIL_TIMEOUT=3
update-grub
grep "timeout=3" /boot/grub/grub.cfg