christian-korneck

    ┌───┬──┐    ,              _     _
    │ ╷╭╯╷ │   /|   |         | |   | |
    │  └╮  │    |___|    _    | |   | |    __
    │ ╰─┼╯ │    |   |\  |/    |/    |/    /  \_
    └───┴──┘    |   |/  |__/  |__/  |__/  \__/

christian-korneck

• e.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>com.apple.security.hypervisor</key>
    <true/>
</dict>

christian-korneck

#!/usr/sbin/dtrace -s
/*
 * newproc.d - snoop new processes as they are executed. DTrace OneLiner.
 *
 * This is a DTrace OneLiner from the DTraceToolkit.
 *
 * 15-May-2005	Brendan Gregg	Created this.
 */

/*

christian-korneck

```
package_repository_manager.clear_caches()
```

christian-korneck

prepend in /etc/pam.d/sudo: (needs to get repeated after OS updates)

auth       sufficient     pam_tid.so

inspired by.
https://github.com/nullpo-head/WSL-Hello-sudo.
(Windows Hello Face Recognition for sudo auth in WSL)

christian-korneck

```
sleep() {
    if [[ $@ == "infinity" ]]; then
        while true
        do
                /bin/sleep 1
        done
    else
        /bin/sleep "$@"
    fi

christian-korneck

```
// Create a large heap allocation of 10 GiB
// to prevent garbage collection gets 
// triggered before the amount of heap
// allocation is reached

	ballast := make([]byte, 10<<30)
```

christian-korneck

```
pushd $HOME/.ssh
cp -p id_rsa id_rsa.pem
ssh-keygen -p -N "" -m pem -f id_rsa.pem #replaces file
popd
```

christian-korneck

commands from my meetup session Jan 2021

uptime #load avg
dmesg -T | tail #kernel msgs
vmstat -Sm 1 #mem in MB
vmstat -Sm 1 -d 1 #disk in MB
mpstat -P ALL 1 #cpus
pidstat -t 1 #procs with threads
iostat -xy 1 #disk queue length, etc

christian-korneck

FROM archlinux
RUN pacman -Sy --noconfirm git go base-devel docker
# makepkg needs to run under an unprived user and sudo out
RUN useradd -m -G wheel -s /bin/sh worker
RUN echo "ALL ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/tempbuild
USER worker
RUN cd $HOME && git clone https://aur.archlinux.org/docker-pushrm.git
RUN cd $HOME/docker-pushrm && makepkg -si --noconfirm
USER root
RUN rm /etc/sudoers.d/tempbuild