bash 如何通过SSH查找特定目录中存在的文件
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原文地址: http://stackoverflow.com/questions/5325332/
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how to find a file exists in particular dir through SSH
提问by Tree
how to find a file exists in particular dir through SSH
如何通过SSH查找特定目录中存在的文件
for example : host1 and dir /home/tree/TEST
例如：host1 和目录 /home/tree/TEST
Host2:- ssh host1 - find the TEST file exists or not using bash
Host2:- ssh host1 - 使用 bash 查找 TEST 文件是否存在
回答by Erik
ssh will return the exit code of the command you ask it to execute:
ssh 将返回您要求它执行的命令的退出代码：
if ssh host1 stat /home/tree/TEST \> /dev/null 2\>\&1
then
echo File exists
else
echo Not found
fi
You'll need to have key authentication setup of course, so you avoid the password prompt.
当然，您需要进行密钥身份验证设置，以免出现密码提示。
回答by mikeytown2
This is what I ended up doing after reading and trying out the stuff here:
这是我在阅读并尝试了这里的东西后最终做的事情：
FileExists=`ssh host "test -e /home/tree/TEST && echo 1 || echo 0"`
if [ ${FileExists} = 0 ]
#do something because the file doesn't exist
fi
More info about test: http://linux.die.net/man/1/test
有关测试的更多信息：http: //linux.die.net/man/1/test
回答by Drew Anderson
An extension to Erik's accepted answer.
Erik 已接受答案的扩展。
Here is my bash script for waiting on an external process to upload a file. This will block current script execution indefinitely until the file exists.
这是我的 bash 脚本，用于等待外部进程上传文件。这将无限期地阻止当前脚本的执行，直到文件存在。
Requires key-based SSH access although this could be easily modified to a curl version for checks over HTTP.
需要基于密钥的 SSH 访问，尽管这可以很容易地修改为 curl 版本以通过 HTTP 检查。
This is useful for uploads via external systems that use temporary file names:
这对于通过使用临时文件名的外部系统上传非常有用：
- rsync
- transmission (torrent)
- 同步
- 传输（洪流）
Script below:
脚本如下：
#!/bin/bash
set -vx
#AUTH="user@server"
AUTH=""
#FILE="/tmp/test.txt"
FILE=""
while (sleep 60); do
if ssh ${AUTH} stat "${FILE}" > /dev/null 2>&1; then
echo "File found";
exit 0;
fi;
done;
回答by karni
No need for echo. Can't get much simpler than this :)
不需要回声。没有比这更简单的了:)
ssh host "test -e /path/to/file"
if [ $? -eq 0 ]; then
# your file exists
fi
