set的使用（ex34.sh）

bash脚本设置系统信息并重置参数

最新推荐文章于 2025-07-29 23:28:59 发布

原创最新推荐文章于 2025-07-29 23:28:59 发布 · 1w 阅读

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本文介绍了一个bash脚本如何通过命令行参数接收输入，并使用`uname-a`命令获取系统信息。脚本将系统信息设置为参数值，然后重置参数到`uname-a`的输出结果，展示了一种在bash脚本中灵活处理系统信息的方法。

#!/bin/bash
# ex34.sh
# Script "set-test"

# Invoke this script with three command-line parameters,
# for example, "sh ex34.sh one two three".

echo
echo "Positional parameters before  set \`uname -a\` :"
echo "Command-line argument #1 = $1"
echo "Command-line argument #2 = $2"
echo "Command-line argument #3 = $3"


set `uname -a` # Sets the positional parameters to the output
               # of the command `uname -a`

echo
echo +++++
echo $_        # +++++
# Flags set in script.
echo $-        # hB
#                Anomalous behavior?
echo

echo "Positional parameters after  set \`uname -a\` :"
# $1, $2, $3, etc. reinitialized to result of `uname -a`
echo "Field #1 of 'uname -a' = $1"
echo "Field #2 of 'uname -a' = $2"
echo "Field #3 of 'uname -a' = $3"
echo \#\#\#
echo $_        # ###
echo

exit 0

[root@localhost shell]# ./ex34.sh one two three

Positional parameters before set `uname -a` :
Command-line argument #1 = one
Command-line argument #2 = two
Command-line argument #3 = three

+++++
+++++
hB

Positional parameters after set `uname -a` :
Field #1 of 'uname -a' = Linux
Field #2 of 'uname -a' = localhost.localdomain
Field #3 of 'uname -a' = 2.6.25-14.fc9.i686
###
###

[root@localhost shell]# uname -a
Linux localhost.localdomain 2.6.25-14.fc9.i686 #1 SMP Thu May 1 06:28:41 EDT 2008 i686 i686 i386 GNU/Linux

set的使用 （ex34.sh）

set的使用（ex34.sh）