Help with linux questions please
so i am just beginning my studies on linux. I am currently reading an old book my teacher gave me and unfortunatly the answer pages are torn out. I have ones questions that i need some help on.
the question asks to describe what each line of the script does.
i understand what #!/bin/bash does, however, after that im stumped. thank you for any help
[FONT=Arial, sans-serif]#!/bin/bash[/FONT]
[FONT=Arial, sans-serif]myFile=Test.txt[/FONT]
[FONT=Arial, sans-serif]touch $myFile[/FONT]
[FONT=Arial, sans-serif]date > $myFile[/FONT]
[FONT=Arial, sans-serif]date +%Y%m%d >> $myFile[/FONT]
[FONT=Arial, sans-serif]date +%F >> $myFile[/FONT]
[FONT=Arial, sans-serif]date +%F--%k:%M >> $myFile[/FONT]
[FONT=Arial, sans-serif]myFile=Test_$(date +%F--%k:%M).txt[/FONT]
[FONT=Arial, sans-serif]touch $myFile
[/FONT]
the question asks to describe what each line of the script does.
i understand what #!/bin/bash does, however, after that im stumped. thank you for any help
[FONT=Arial, sans-serif]#!/bin/bash[/FONT]
[FONT=Arial, sans-serif]myFile=Test.txt[/FONT]
[FONT=Arial, sans-serif]touch $myFile[/FONT]
[FONT=Arial, sans-serif]date > $myFile[/FONT]
[FONT=Arial, sans-serif]date +%Y%m%d >> $myFile[/FONT]
[FONT=Arial, sans-serif]date +%F >> $myFile[/FONT]
[FONT=Arial, sans-serif]date +%F--%k:%M >> $myFile[/FONT]
[FONT=Arial, sans-serif]myFile=Test_$(date +%F--%k:%M).txt[/FONT]
[FONT=Arial, sans-serif]touch $myFile
[/FONT]
Comments
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brownwrap
Member Posts: 549
This is a script. You should be able to execute each entry on the command line and see the results. -
ChooseLife
Member Posts: 941 ■■■■■■■□□□
What in your understanding does each of these lines do? Post your take on it so other can comment. If you don't know what >, >>, $myFile mean, it's a good idea to start with a Bash tutorial first.“You don’t become great by trying to be great. You become great by wanting to do something, and then doing it so hard that you become great in the process.” (c) xkcd #896
GetCertified4Less - discounted vouchers for certs -
brownwrap
Member Posts: 549
This is a script. You should be able to execute each entry on the command line and see the results.
myFile=Test.txt
ls -larth
total 12
drwx
30 ramosg staff 4.5K Feb 17 13:39 ../
drwx
2 ramosg staff 512 Feb 17 13:41 ./
-rw
1 ramosg staff 0 Feb 17 13:41 Test.txtdate > $myFile
ls -larth
total 14
drwx
30 ramosg staff 4.5K Feb 17 13:39 ../
drwx
2 ramosg staff 512 Feb 17 13:41 ./
-rw
1 ramosg staff 29 Feb 17 13:41 Test.txt
[ramosg@appoc9 tmp]$ more Test.txt
Fri Feb 17 13:41:23 MST 2012
[ramosg@appoc9 tmp]$
date +%Y%m%d >> $myFile
[ramosg@appoc9 tmp]$ more Test.txt
Fri Feb 17 13:41:23 MST 2012
20120217
date +%F >> $myFile
[ramosg@appoc9 tmp]$ more Test.txt
Fri Feb 17 13:41:23 MST 2012
20120217
2012-02-17
[ramosg@appoc9 tmp]$
date +%F--%k:%M >> $myFile
[ramosg@appoc9 tmp]$ more Test.txt
Fri Feb 17 13:41:23 MST 2012
20120217
2012-02-17
2012-02-17--14:15
[ramosg@appoc9 tmp]$
myFile=Test_$(date +%F--%k:%M).txt
[ramosg@appoc9 tmp]$ echo $myFile
Test_2012-02-17--14:16.txt
[ramosg@appoc9 tmp]$
[ramosg@appoc9 tmp]$ touch $myFile
[ramosg@appoc9 tmp]$ ls -larth
total 14
drwx
30 ramosg staff 4.5K Feb 17 13:39 ../
-rw
1 ramosg staff 67 Feb 17 14:15 Test.txt
drwx
2 ramosg staff 512 Feb 17 14:18 ./
-rw
1 ramosg staff 0 Feb 17 14:18 Test_2012-02-17--14:16.txt
[ramosg@appoc9 tmp]$
[ramosg@appoc9 tmp]$