檢查文件是否存在，如果存在則將其刪除

Question

我的問題是：我想檢查/tmp文件夾中是否存在文件，並在開始下載之前將其刪除。

這裏是我的代碼（木偶）：

exec { 'Download mediawiki to temp': 
    cwd  => '/tmp', 
    command => '/usr/bin/wget https://releases.wikimedia.org/mediawiki/1.27/mediawiki-1.27.1.tar.gz',  
} 

Answer 1

你可能想做到這一點...

# local vars for readability 
$theurl  = 'https://releases.wikimedia.org/mediawiki/1.27' 
$tarball  = 'mediawiki-1.27.1.tar.gz' 
$wget_command = "/usr/bin/wget $theurl/$tarball" 
$rm_command = "/bin/rm -f /tmp/$tarball" 

exec { 'Delete mediawiki from temp': 
    cwd  => '/tmp', 
    command => $rm_command, 
}-> 
exec { 'Download mediawiki to temp': 
    cwd  => '/tmp', 
    command => $wget_command, 
    creates => "/tmp/$tarball", 
} 

見https://docs.puppet.com/puppet/latest/reference/types/exec.html和https://docs.puppet.com/puppet/latest/reference/lang_relationships.html