blocks|key|1465622|text|CMDS[1]="git+clone+--bare+$1+$TARGET_NAME"
CMDS[2]="touch+${TARGET_NAME}/git-daemon-export-ok"
CMDS[3]="scp+-r+$TARGET_NAME+$REMOTE_ROOT"
CMDS[4]="rm+-rf+$TARGET_NAME"

#+...

for+x+in+1+2+3+4
do
++++${CMDS[x]};
done|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1465623|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>CMDS[1]="git clone --bare $1 $TARGET_NAME"
CMDS[2]="touch ${TARGET_NAME}/git-daemon-export-ok"
CMDS[3]="scp -r $TARGET_NAME $REMOTE_ROOT"
CMDS[4]="rm -rf $TARGET_NAME"

# ...

for x in 1 2 3 4
do
 ${CMDS[x]};
done
</code></pre>

blocks|key|1465619|text|你可以把你的CMD放在array里吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1465620|entityMap|0|LINK|mutability|MUTABLE|url|http://tldp.org/LDP/abs/html/arrays.html^0|B|5|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Could you put your CMD's in an <a href="http://tldp.org/LDP/abs/html/arrays.html" rel="nofollow noreferrer">array</a> instead?

blocks|key|1465640|text|你需要${!parameter}语法，至少可以在bash中工作。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1465641|#!/bin/sh

CMD1="ls"
CMD2="pwd"

for+CMD+in+{CMD1,CMD2}+;+do
++++echo+${!CMD}
++++${!CMD}
done|code-block|syntax|javascript|1465642|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You want the ${!parameter} syntax, works in bash atleast. e.g.

<pre><code>#!/bin/sh

CMD1="ls"
CMD2="pwd"

for CMD in {CMD1,CMD2} ; do
 echo ${!CMD}
 ${!CMD}
done
</code></pre>

blocks|key|1206037|text|你们都忘了seq(1)。它接受三个参数:+seq+START+INTERVAL+END，并生成一个新行分隔的介于(包括)+START和END之间的列表，因此您可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1206038|for+i+in+`seq+1+1+4`
do
+++echo...|code-block|syntax|javascript|1206039|另外：|1206040|如果在host:之后提供了相对路径，则假定它是登录用户的主目录。所以你可以这样做：|offset|length|style|CODE|1206041|REMOTE_ROOT="${HOST}:"|1206042|entityMap^0|0|0|0|3|5|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|V|8|@$K|W|L|X|M|N]]|9|@]|A|$]]|$1|O|3|P|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

y'all forgot seq(1). it takes three arguments: seq START INTERVAL END and produces a new line delimited list of between (inclusively) START and END, so you could do:

<pre><code>for i in `seq 1 1 4`
do
 echo...
</code></pre>

also:

if a relative path is given after <code>host:</code>, it's assumed to be the login user's home directory. so you can just do:

<pre><code>REMOTE_ROOT="${HOST}:"
</code></pre>

blocks|key|4423014|text|这更多的是一种调试/故障排除功能，并没有准确地回答您的问题，但我发现它很有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4423015|#!/bin/bash

#+Enable+command+echoing
set+-x+

pwd
uname+-a

#+Disable+command+echoing
set+%2Bx

echo+'Command+echoing+off+now'|code-block|syntax|javascript|4423016|示例运行：|4423017|~$+./foo.sh+
%2B+pwd
/home/jason
%2B+uname+-a
Linux+jpc+2.6.26-2-amd64+#1+SMP+Sun+Jun+21+04:47:08+UTC+2009+x86_64+GNU/Linux
%2B+set+%2Bx
Command+echoing+off+now
~$+|4423018|或者，如果您有一个类似的文件：|4423019|#!/bin/bash

pwd
uname+-a|4423020|您可以使用bash+-x来做同样的事情，而不必修改文件：|offset|length|style|CODE|4423021|~$+bash+-x+./bar.sh+
%2B+pwd
/home/jason
%2B+uname+-a
Linux+jpc+2.6.26-2-amd64+#1+SMP+Sun+Jun+21+04:47:08+UTC+2009+x86_64+GNU/Linux
~$+|4423022|entityMap^0|0|0|0|0|0|0|5|7|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|14|8|@$Q|15|R|16|S|T]]|9|@]|A|$]]|$1|U|3|V|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

This is more of a debugging/troubleshooting feature, and doesn't exactly answer your question, but I find it useful:

<pre><code>#!/bin/bash

# Enable command echoing
set -x 

pwd
uname -a

# Disable command echoing
set +x

echo 'Command echoing off now'
</code></pre>

Example run:

<pre><code>~$ ./foo.sh 
+ pwd
/home/jason
+ uname -a
Linux jpc 2.6.26-2-amd64 #1 SMP Sun Jun 21 04:47:08 UTC 2009 x86_64 GNU/Linux
+ set +x
Command echoing off now
~$ 
</code></pre>

Or if you had a similar file:

<pre><code>#!/bin/bash

pwd
uname -a
</code></pre>

You could use <code>bash -x</code> to do the same thing without having to modify the file:

<pre><code>~$ bash -x ./bar.sh 
+ pwd
/home/jason
+ uname -a
Linux jpc 2.6.26-2-amd64 #1 SMP Sun Jun 21 04:47:08 UTC 2009 x86_64 GNU/Linux
~$ 
</code></pre>

In BASH, I want to do something like this:

<pre><code>#!/bin/bash 

HOST="blah"
USER="foo"
REMOTE_ROOT="${HOST}:~${USER}/"

REP_NAME=`basename $1`
TARGET_NAME="${REP_NAME}.git"

CMD1="git clone --bare $1 $TARGET_NAME"
CMD2="touch ${TARGET_NAME}/git-daemon-export-ok"
CMD3="scp -r $TARGET_NAME $REMOTE_ROOT"
CMD4="rm -rf $TARGET_NAME"

for i in {1..4}
do
 CMD="${CMD${i}}"
 echo "$CMD"
 `$CMD`
done
</code></pre>

That is to say, I want to loop over a list of commands, display the command being executed, then execute it.

I don't know how to do the double dereferencing (CMD="${CMD${i}}" isn't legal in BASH).

Alternately, I'd be happy to do something like:

<pre><code>for CMD in "CMD1 CMD2 CMD3 CMD4"
do
 echo $$CMD
done
</code></pre>

but of course that isn't the right syntax, either.

Looping over commands to print and execute in BASH

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在BASH中，我想这样做：#!/bin/bash                                                                     HOST="blah"USER="foo"REMOTE_ROOT="${HOST}:~${USER}/"REP_NAME=`basename $1`TARGET_NAME="${REP_NAME}.git"CMD1

问遍历要在BASH中打印和执行的命令
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