watchdmesg.sh #!/bin/bash watch --color -n 0.5 "dmesg --color=always | tail -n 30" removeoldkernels.sh #!/bin/bash -eu KERNEL_VARIANT="$(uname -r | awk -F "-" '{print $NF}')" KERNEL_VERSION="$(uname -r | sed -e "s/-${KERNEL_VARIANT}//")" echo "Currently running: ${KERNEL_VERSION}-${KERNEL_VARIANT}" ALL_VER="$(dpkg --list | grep -e linux-image -e linux-headers | grep -v -e linux-headers-${KERNEL_VARIANT} -e linux-image-${KERNEL_VARIANT} | awk '{print $3}' | sed 's/+.*$//' | sort -uV)" echo "All installed:" ${ALL_VER} NUM_INSTALLED="$(echo "${ALL_VER}" | wc -l)" if [ ${NUM_INSTALLED} -lt 3 ]; then echo "2 or fewer kernel versions installed, quitting" exit fi NUM_TO_REMOVE="$(expr ${NUM_INSTALLED} - 2)" REMOVE_VER="$(echo "${ALL_VER}" | head -n ${NUM_TO_REMOVE})" REMOVE_PACKAGES="$(dpkg --list | grep -e "${REMOVE_VER}" | grep -v libc | awk '{print $2}')" echo "Removing:" ${REMOVE_PACKAGES} sudo apt-get purge ${REMOVE_PACKAGES} # would be nice: check that the current version is the most recent of installed versions. lmcuexport.sh #!/bin/bash -ex sed -i 's/","/"\t"/g' $1 sed -i 's/<br \/>/\n/g' $1 sed -i 's/\&/\&/g' $1 ttltrick.sh #!/bin/bash -x iwconfig 2> /dev/null | grep --color=always "Power Management:" TTLMOD=$(sudo iptables -t mangle -L POSTROUTING | grep TTL) if [ -z "${TTLMOD}" ]; then sudo iptables -t mangle -A POSTROUTING -j TTL --ttl-set 65 fi exit 0 sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf nmcli connection add ifname enp0s25 con-name StewNAT type ethernet ipv4.method shared ipv4.addresses 10.42.0.1/24 ipv6.method shared nmcli connection delete StewNAT cpufreq.sh #!/bin/bash -ex # Found this trick at: # https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/power_management_guide/tuning_cpufreq_policy_and_speed cpupower frequency-info --policy sudo cpupower frequency-set --max 2500000 --min 800000 --governor powersave cpupower frequency-info --policy xbacklight -set 25 # Seems like this is not necessary - no need to add processor.ignore_ppc=1 to kernel command line. # Not sure if this is necessary: sudo apt install linux-tools-generic-hwe-16.04 # Probably not necessary: # /etc/modprobe.d/lenovo-acpi.conf # options thinkpad_acpi fan_control=1 # Other potentially relevant links: # https://wiki.archlinux.org/index.php/CPU_frequency_scaling # http://www.thinkwiki.org/wiki/Problem_with_CPU_frequency_scaling # http://www.thinkwiki.org/wiki/How_to_use_cpufrequtils install_atom.sh curl -sL https://packagecloud.io/AtomEditor/atom/gpgkey | sudo apt-key add - sudo sh -c 'echo "deb [arch=amd64] https://packagecloud.io/AtomEditor/atom/any/ any main" > /etc/apt/sources.list.d/atom.list' sudo apt-get update watchcpufreq.sh #!/bin/bash watch -n 0.2 'grep "cpu MHz" /proc/cpuinfo' |