When the shell script executes, passes parameters to the script

Shell scripts can also receive script parameters, like commands and applications, as they are executed .

An application example:

VI addhead.sh:

Suaddhead ns=591 <$1 |sushw key=dt a=20000|sushw key=fldr,cdp a=1,1 b=0,1 c=1,0 j=1301,1301> $

Perform:

./addhead.sh Rtm_step10_lap.dat rtm_step10_lap.su (where rtm_step10_lap.dat is input data, input to $ $, output: rtm_step10_lap.su)

The tutorials are as follows:

You can use a system-defined positional variable, which is a special type of variable, and you can use the 9 variable to $9 when referencing a script parameter.

Example: Cat example1.sh

#!/bin/bash

#Demonstrate the use of positive variables.

echo "The first parameter:" $

echo "The second parameter:" $

echo "The third parameter:" $

echo "The fourth parameter:" $4

In the above script, the 1th 2 3 4 parameters that were passed to the script file are captured and output by using the $ $ $ $4.

Perform:

#为脚本文件添加可执行权限

chmod u+x example1.sh

#./example1.sh one three four

The first Parameter:one

The second Parameter:two

The three Parameter:three

The fourth Parameter:four

Example 2:example2.sh

Echo ' $ ' = ' $ ' $ ' = ' $ ' $ ' "=" $ $

echo ' $4 ' = ' $4 ' "=" $ $6 ' "=" $6

echo ' $7 ' = "$7 ' $8 '" = "$8 ' $9 '" = "$9

Run:

./example2.sh a b c d e F g h i

Get:

$ = A $ = b $ = c

$4 = d = $ = e $6 = f

$7 = g $8 = h $9 = i

When the shell script executes, passes parameters to the script