blocks|key|4193944|text|我不认为有这样的通配符。但是您可以使用一个循环来迭代值，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4193945|exists_too_high()+{
++++for+value;+do
++++++++if+[+"$value"+-gt+50+];+then
++++++++++++return+0
++++++++fi
++++done
++++return+1
}

if+exists_too_high+"$ping_1"+"$ping_2"+"$ping_3"+"$ping_4";+then
++++echo+"One+ping+is+to+high"
else
++++echo+"The+pings+are+fine"
fi|code-block|syntax|javascript|4193946|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|$]]

I don't think there's such wildcard.
But you could use a loop to iterate over values, for example:

<pre><code>exists_too_high() {
 for value; do
 if [ "$value" -gt 50 ]; then
 return 0
 fi
 done
 return 1
}

if exists_too_high "$ping_1" "$ping_2" "$ping_3" "$ping_4"; then
 echo "One ping is to high"
else
 echo "The pings are fine"
fi
</code></pre>

blocks|key|4193954|text|您可以使用"and“(-a)+param：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4193955|if+[+$ping_1+-gt+50+-a+\
+++++$ping_2+-gt+50+-a+\
+++++$ping_3+-gt+50+-a+];+then
+++...
+++...|code-block|syntax|javascript|4193956|或者，您可以创建一个数组并使用一个循环进行检查，而不是定义许多变量：|4193957|pings%2B=($(ping+-c+1+www.test.com+%7C+tail+-1%7C+awk+'{print+$4}'+%7C+cut+-d+'/'+-f+2+%7C+sed+'s/\.[%5E.]*$//'))
pings%2B=($(ping+-c+1+www.test1.com+%7C+tail+-1%7C+awk+'{print+$4}'+%7C+cut+-d+'/'+-f+2+%7C+sed+'s/\.[%5E.]*$//'))
pings%2B=($(ping+-c+1+www.test2.com+%7C+tail+-1%7C+awk+'{print+$4}'+%7C+cut+-d+'/'+-f+2+%7C+sed+'s/\.[%5E.]*$//'))
pings%2B=($(ping+-c+1+www.test3.com+%7C+tail+-1%7C+awk+'{print+$4}'+%7C+cut+-d+'/'+-f+2+%7C+sed+'s/\.[%5E.]*$//'+))

too_high=0
for+ping+in+${pings[@]};+do
++++if+[+$ping+-gt+50+];+then
++++++++too_high=1
++++++++break
++++fi
done

if+[+$too_high+-eq+1+];+then
++++echo+"One+ping+is+to+high"
else
++++echo+"The+pings+are+fine"
fi|4193958|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can use "and" (-a) param:

<pre><code>if [ $ping_1 -gt 50 -a \
 $ping_2 -gt 50 -a \
 $ping_3 -gt 50 -a ]; then
 ...
 ...
</code></pre>

Or instead of defining a lot of variables, you can make an array and check with a loop:

<pre><code>pings+=($(ping -c 1 www.test.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//'))
pings+=($(ping -c 1 www.test1.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//'))
pings+=($(ping -c 1 www.test2.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//'))
pings+=($(ping -c 1 www.test3.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//' ))

too_high=0
for ping in ${pings[@]}; do
 if [ $ping -gt 50 ]; then
 too_high=1
 break
 fi
done

if [ $too_high -eq 1 ]; then
 echo "One ping is to high"
else
 echo "The pings are fine"
fi
</code></pre>

blocks|key|2508046|text|您所指出的问题的答案是，是的，您可以使用bash+(但不是sh)中的参数展开来实现这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2508047|#!/bin/bash
ping_1=foo
ping_2=bar
ping_etc=baz
for+var+in+"${!ping_@}"
do
++echo+"$var+is+set+to+${!var}"
done|code-block|syntax|javascript|2508048|将打印|2508049|ping_1+is+set+to+foo
ping_2+is+set+to+bar
ping_etc+is+set+to+baz|2508050|这是man+bash|offset|length|style|CODE|2508051|+++${!prefix*}
+++${!prefix@}
++++++++++Names+matching+prefix.++Expands+to+the+names+of+variables++whose
++++++++++names+begin+with+prefix,+separated+by+the+first+character+of+the
++++++++++IFS+special+variable.++When+@+is+used+and+the+expansion++appears
++++++++++within++double++quotes,+each+variable+name+expands+to+a+separate
++++++++++word.|2508052|解决实际问题的方法是使用数组。|2508053|entityMap^0|0|0|0|0|2|8|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@$M|11|N|12|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

The answer to your stated problem is that yes, you can do this with parameter expansion in bash (but not in sh):

<pre><code>#!/bin/bash
ping_1=foo
ping_2=bar
ping_etc=baz
for var in "${!ping_@}"
do
 echo "$var is set to ${!var}"
done
</code></pre>

will print

<pre><code>ping_1 is set to foo
ping_2 is set to bar
ping_etc is set to baz
</code></pre>

Here's <code>man bash</code>:

<pre><code> ${!prefix*}
 ${!prefix@}
 Names matching prefix. Expands to the names of variables whose
 names begin with prefix, separated by the first character of the
 IFS special variable. When @ is used and the expansion appears
 within double quotes, each variable name expands to a separate
 word.
</code></pre>

The answer to your actual problem is to use arrays instead.

blocks|key|4194021|text|要用基于数组的解决方案来补充现有的、有帮助的答案，说明：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4194022|几种先进的巴什技术(鲁棒的数组处理、复合条件处理、处理命中失败的情况)|unordered-list-item|4194023|一种通过单个ping命令从sed输出中提取平均定时的优化方法(同时适用于GNU和BSD/macOS+sed)。|offset|length|style|CODE|4194024|报告使用时间过长或无法按名称进行响应的服务器。|4194025|#!/usr/bin/env+bash

#+Determine+the+servers+to+ping+as+an+array.
servers=(+'www.test.com'+'www.test1.com'+'www.test2.com'+'www.test3.com'+)

#+Initialize+the+array+in+which+timings+will+be+stored,+paralleling+the
#+"${servers[@]}"+array.
avgPingTimes=()

#+Initialize+the+array+that+stores+the+names+of+the+servers+that+either+took
#+too+long+to+respond+(on+average),+or+couldn't+pe+pinged+at+all.
failingServers=()

#+Determine+the+threshold+above+which+a+timing+is+considered+too+high,+in+ms.
#+Note+that+a+shell+variable+should+contain+at+least+1+lowercase+character.
kMAX_TIME=50

#+Determine+how+many+pings+to+send+per+server+to+calculate+the+average+timing
#+from.
kPINGS_PER_SERVER=1

for+server+in+"${servers[@]}";+do

++#+Ping+the+server+at+hand,+extracting+the+integer+portion+of+the+average
++#+timing.
++#+Note+that+if+pinging+fails,+$avgPingTime+will+be+empty.+
++avgPingTime="$(ping+-c+"$kPINGS_PER_SERVER"+"$server"+%7C
+++++++++++++++++++sed+-En+'s%7C%5E.*+=+[%5E/]%2B/([%5E.]%2B).%2B$%7C\1%7Cp')"

++#+Check+if+the+most+recent+ping+failed+or+took+too+long+and+add
++#+the+server+to+the+failure+array,+if+so.
++[[+-z+$avgPingTime+%7C%7C+$avgPingTime+-gt+$kMAX_TIME+]]+&&+failingServers%2B=(+"$server"+)

++#+Add+the+timing+to+the+output+array.
++avgPingTimes%2B=(+"$avgPingTime"+)

done

if+[[+-n+$failingServers+]];+then+#+pinging+at+least+1+server+took+too+long+or+failed
++echo+"${#failingServers[@]}+of+the+${#servers[@]}+servers+took+too+long+or+couldn't+be+pinged:"
++printf+'%25s\n'+"${failingServers[@]}"
else
++echo+"All+${#servers[@]}+servers+responded+to+pings+in+a+timely+fashion."
fi|code-block|syntax|javascript|4194026|entityMap^0|0|0|6|4|D|3|1E|3|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|V|8|@$G|W|H|X|I|J]|$G|Y|H|Z|I|J]|$G|10|H|11|I|J]]|9|@]|A|$]]|$1|K|3|L|5|D|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|13|8|@]|9|@]|A|$P|Q]]|$1|R|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|S|$]]

To complement the existing, helpful answers with an array-based solution that demonstrates:

<ul>
<li>several advanced Bash techniques (robust array handling, compound conditionals, handling the case where pinging fails)</li>
<li>an optimized way to extract the average timing from <code>ping</code>'s output by way of a single <code>sed</code> command (works with both GNU and BSD/macOS <code>sed</code>).</li>
<li>reporting the servers that either took too long or failed to respond by name.</li>
</ul>



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

# Determine the servers to ping as an array.
servers=( 'www.test.com' 'www.test1.com' 'www.test2.com' 'www.test3.com' )

# Initialize the array in which timings will be stored, paralleling the
# "${servers[@]}" array.
avgPingTimes=()

# Initialize the array that stores the names of the servers that either took
# too long to respond (on average), or couldn't pe pinged at all.
failingServers=()

# Determine the threshold above which a timing is considered too high, in ms.
# Note that a shell variable should contain at least 1 lowercase character.
kMAX_TIME=50

# Determine how many pings to send per server to calculate the average timing
# from.
kPINGS_PER_SERVER=1

for server in "${servers[@]}"; do

 # Ping the server at hand, extracting the integer portion of the average
 # timing.
 # Note that if pinging fails, $avgPingTime will be empty. 
 avgPingTime="$(ping -c "$kPINGS_PER_SERVER" "$server" |
 sed -En 's|^.* = [^/]+/([^.]+).+$|\1|p')"

 # Check if the most recent ping failed or took too long and add
 # the server to the failure array, if so.
 [[ -z $avgPingTime || $avgPingTime -gt $kMAX_TIME ]] &amp;&amp; failingServers+=( "$server" )

 # Add the timing to the output array.
 avgPingTimes+=( "$avgPingTime" )

done

if [[ -n $failingServers ]]; then # pinging at least 1 server took too long or failed
 echo "${#failingServers[@]} of the ${#servers[@]} servers took too long or couldn't be pinged:"
 printf '%s\n' "${failingServers[@]}"
else
 echo "All ${#servers[@]} servers responded to pings in a timely fashion."
fi
</code></pre>

blocks|key|4593550|text|是的，bash可以通过使用其内部compgen+-v命令(参见SHELL+BUILTIN命令下的man+bash+)列出以$ping_开头的变量，即|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4593551|for+f+in+`compgen+-v+ping_`+foo+;+do+
++++eval+p=\$$f
++++if+[+"$p"+-gt+50+];+then
++++++++echo+"One+ping+is+too+high"
++++++++break+1
++++fi
++++[+$f=foo+]+&&+echo+"The+pings+are+fine"
done|code-block|syntax|javascript|4593552|注意添加的循环项foo+--如果循环通过所有变量，则打印“pings是好的”。|4593553|entityMap^0|3|4|G|A|1C|8|1P|6|0|0|8|3|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$]]

Yes <code>bash</code> can list variables that begin with <code>$ping_</code>, by using its internal <code>compgen -v</code> command, (see <code>man bash</code> under SHELL BUILTIN COMMANDS), i.e.:

<pre><code>for f in `compgen -v ping_` foo ; do 
 eval p=\$$f
 if [ "$p" -gt 50 ]; then
 echo "One ping is too high"
 break 1
 fi
 [ $f=foo ] &amp;&amp; echo "The pings are fine"
done
</code></pre>

Note the added loop item <code>foo</code> -- if the loop gets through all the variables, then print "the pings are fine".

I have this script:

<pre><code>#!/bin/bash
ping_1=$(ping -c 1 www.test.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//')
ping_2=$(ping -c 1 www.test1.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//')
ping_3=$(ping -c 1 www.test2.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//')
ping_4=$(ping -c 1 www.test3.com | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//' )
</code></pre>

Then I would like to treat the outputs of <code>ping_1-4</code> in one variable. Something like this:

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

if [ "$ping_*" -gt 50 ]; then
 echo "One ping is to high"
else
 echo "The pings are fine"
fi
</code></pre>

Is there a possibility in <code>bash</code> to read these variables with some sort of wildcard?

<pre><code>$ping_*
</code></pre>

Did nothing for me.

Multiple variables into one variable with wildcard

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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我有这样的剧本：#!/bin/bashping_1=$(ping -c 1 www.test.com  | tail -1| awk '{print $4}' | cut -d '/' -f 2 | sed 's/\.[^.]*$//')ping_2=$(ping -c 1 www.test1.com | tail -...

问使用通配符将多个变量合并为一个变量
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问使用通配符将多个变量合并为一个变量EN