It creates a systemd "slice" with a memory limit. Ideal if e.g. firefox or chromium eat up all your memory and block your whole desktop. The slice will be OOM killed by systemd / cgroups, if it runs of bounds.

create-memorylimited-slice

#!/bin/bash
# It creates a systemd "slice" with a memory limit. Ideal if e.g. firefox or chromium eat up all your memory and block your whole desktop.
# The slice will be OOM killed by systemd / cgroups, if it runs of bounds.
# usage: ./create-memorylimited-slice /path/to/your/binary

SLICEPATH=${1:-'/usr/bin/firefox'}
SLICENAME=$(basename ${SLICEPATH})

## Create system-wide scripts
cat <<EOF | sudo tee /usr/local/bin/${SLICENAME}-slice > /dev/null
#!/bin/sh

systemd-run --user --slice=${SLICENAME}.slice ${SLICEPATH} "\$@"

EOF
sudo chmod +x /usr/local/bin/${SLICENAME}-slice

cat <<EOF | sudo tee /usr/local/bin/${SLICENAME}-slice-status > /dev/null
systemctl --user status ${SLICENAME}.slice

EOF
sudo chmod +x /usr/local/bin/${SLICENAME}-slice-status

## Create user-based config
mkdir -p /home/aj/.config/systemd/user
cat <<EOF > ~/.config/systemd/user/${SLICENAME}.slice
[Slice]
MemoryMax=4G

EOF

cat <<EOF
Scripts installed, slice limit set to 4GB. It can be configured in this file ~/.config/systemd/user/${SLICENAME}.slice
Start the firefox slice with "${SLICENAME}-slice"
Check the Memory usage with "${SLICENAME}-slice-status"
EOF