记录第n次创建启用并清理临时swap

2023-12-05

摘要

时常要用 chatgpt 辅助生成 swap，记录下来方便

脚本

#!/bin/bash

function create_swap {
    SWAPFILE=$1
    SIZE=$2

    mkdir -p $(dirname "$SWAPFILE")

    sudo dd if=/dev/zero of="$SWAPFILE" bs=1G count="$SIZE" status=progress

    sudo chmod 600 "$SWAPFILE"

    sudo mkswap "$SWAPFILE"
    sudo swapon "$SWAPFILE"

    echo "Swap file created and enabled at $SWAPFILE with size ${SIZE}G"
}

function clean_swap {
    SWAPFILE=$1

    if [ -f "$SWAPFILE" ]; then
        sudo swapoff "$SWAPFILE"
        sudo rm -f "$SWAPFILE"
        echo "Swap file at $SWAPFILE has been removed."
    else
        echo "Swap file at $SWAPFILE does not exist."
    fi
}

CLEAN_MODE=0

while getopts "c" opt; do
    case $opt in
        c)
            CLEAN_MODE=1
            ;;
        \?)
            echo "Invalid option: -$OPTARG" >&2
            exit 1
            ;;
    esac
done

shift $((OPTIND -1))

if [ "$CLEAN_MODE" -eq 1 ]; then
    if [ "$#" -ne 1 ]; then
        echo "Usage: $0 -c [swap file path]"
        exit 1
    fi
    clean_swap $1
else
    if [ "$#" -ne 2 ]; then
        echo "Usage: $0 [swap file path] [size in GB]"
        exit 1
    fi
    create_swap $1 $2
fi

运行

chmod +x create_swap.sh

# 创建 swap 文件
./create_swap.sh [swap file path] [size in GB]
# 清理 swap 文件
./create_swap.sh -c [swap file path]