bash更新脚本返回true但无论如何都会失败[重复]

Question

我正在编写“启动更新”bash 脚本，但在 Konsole 中打开它会返回：

~~~~~~-~~~~~@~~~~~~-~~~~~-~~-~~~~~~~~-~~~:~/Documents$ ./update.sh
./update.sh: 3: ./update.sh: [True=True]: not found
~~~~~~-~~~~~@~~~~~~-~~~~~-~~-~~~~~~~~-~~~:~/Documents$

这里是代码（screenshot）：

#!/bin.sh
upd=True
while [$upd=True]
do
    echo "Updateing..."
    end=0
    sudo apt-get -yV update
    if [$?=0 -o $end=0]
    then
        end=1
        sudo apt-get -yV upgrade
        if [$?=0 -o $end=1]
        then
            end=2
            sudo apt-get -yV autoremove
            if [$?=0 -o $end=2]
            then
                end=3
                sudo apt-get -yV autoclean
                if [$?=0 -o $end=3]
                then
                    end=4
                    sudo apt-get -yV dist-upgrade
                    if [$?=0 -o $end=4]
                    then
                        end=5
                        sudo apt -yV update
                        if [$?=0 -o $end=5]
                        then
                            end=6
                            sudo apt full-upgrade
                            if [$?=0 -o $end=6]
                            then
                                upd=False
                            fi
                        fi
                    fi
                fi
            fi
        fi
    fi
done
exit 0

Answer 1

我想问题出在

while [$upd=True] #Mind the spaces after [ and before ]

应该是的

while [ "$upd" = True ] #Also the mind spaces before and after =

注意

$upd 放在双引号中以防止分词。