英文:
'\n' cannot be identified when i was running ssh command with parallel command
问题
-
通常情况下，我可以运行以下命令
ssh -lroot [主机IP] "echo -e 'test1\ntest2'" > ~/test.txt来将两行文本写入主机 [主机IP] 的 test.txt 文件。 -
然而，当我尝试与 parallel 结合使用时，即
parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e 'test1\ntest2' \> ~/test.txt"，它会忽略 '\n' 并实际写入 test.txt 的内容为 'test1ntest2'。 -
如何使 '\n' 在 parallel 命令中按预期工作？有人可以帮助澄清吗？
-
我尝试在单引号前添加反斜杠，如下所示：
parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e \'test1\ntest2\' \> ~/test.txt"
但仍然不如预期。 -
尝试在 '\n' 前添加反斜杠，也没有起作用。
parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e 'test1\\ntest2' \> ~/test.txt"
我只是想使用 parallel 批量将两行文本写入远程服务器的特定文件...
英文:
-
Commonly, I can run this command
ssh -lroot [host ip] "echo -e 'test1\ntest2'" > ~/test.txtto write two lines in test.txt file in host [host ip]. -
However, when i used it with parallel, that is
parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e 'test1\ntest2' \> ~/test.txt", it'll ignore '\n' and write 'test1ntest2' actually into test.txt. -
How to make '\n' work as expect in parallel command? Anybody can help to clarify?
-
I have tried to add backslash before single quotes as below：
parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e \'test1\ntest2\' \> ~/test.txt"
It's still not as expect. -
Tried to add backslash before '\n', also did not work.
parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e 'test1\\ntest2' \> ~/test.txt"
I just want to write two lines to a certain file of remote server in bulk by using parallel...
答案1
得分: 1
已经使用以下命令修复了此问题：parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e 'test1\\\\ntest2' \> ~/test.txt"
我认为解析过程可能如下：
- 正常输入：
\\\\n - 本地主机 shell 解析一层反斜杠：
\\n - parallel 命令识别单引号，保持原样：
\\n - ssh 解析一层反斜杠：
\n - 'echo -e' 命令将
\n解析为换行符。
如果我们将单引号更改为双引号或直接删除单引号，则反斜杠的数量需要更改为两个：parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e "test1\\\\\\\\ntest2" \> ~/test.txt"。
祝大家玩得开心：)。
英文:
Already fixed this issue with command:parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e 'test1\\\\ntest2' \> ~/test.txt"
I think the parsing process maybe as below:
- normal input:
\\\\n - local host shell parses one layer backslash:
\\n - parallel command identifys single quotes, keep origin:
\\n - ssh parses one layer backslash:
\n - 'echo -e' command parses
\nto new line.
If we change single quotes to double quotes or remove single quotes directly, the number of backslash needs to change to double: parallel -a argfile -j3 -k --tag ssh -lroot {} "echo -e "test1\\\\\\\\ntest2" \> ~/test.txt".
Have fun guys:).
答案2
得分: 0
也尝试 --nonall：
parallel --slf argfile -j3 -k --nonall --tag --ssh 'ssh -lroot' echo -e 'test1\\ntest2' \> ~/test.txt
英文:
Also try --nonall:
parallel --slf argfile -j3 -k --nonall --tag --ssh 'ssh -lroot' echo -e 'test1\\ntest2' \> ~/test.txt
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