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Old 08-31-2009, 09:17 PM   #1
sk185094
LQ Newbie
 
Registered: Apr 2009
Posts: 2

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Question develop basic sles shell script


I would like to create a few basic shell scripts to automate repeated file copy and set permissions.

Could someone point me in the right direction ?

Here are some of the basic commands I would like to place into a script.

# sum dkmscheck rmkern libbash

17989 6 dkmscheck
08482 2 rmkern
48339 2 libbash

# cp rmkern /opt/gsctools/bin
# chmod 700 /opt/bin/rmkern

# cp dkmscheck /opt/bin
# chmod 700 /opt/bin/dkmscheck

# mkdir p /opt/lib/shell
# cp libbash /opt/lib/shell
# chmod 700 /opt/lib/shell/libbash
 
Old 08-31-2009, 10:01 PM   #2
kbp
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Registered: Aug 2009
Posts: 3,790

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Hi sk185094,

Scripts can be as complex as you like, a couple of things to keep in mind -

- ensure the commands you are running are repeatable or do not require interaction

eg.
Code:
cp rmkern /opt/gsctools/bin
- what happens when the file exists? change to:

Code:
cp -f rmkern /opt/gsctools/bin

- use test conditions to give yourself alternate actions
eg.
Code:
if [ -r /tmp/test ] # is file readable?
then
  echo "File already present"
else
  cp -f /tmp/myfile /tmp/test
fi

- send command output to /dev/null if not required
eg.
Code:
grep test /tmp/myfile > /dev/null 2>&1 # output not required

- you can find the return code of the last command by using '$?'
eg.
Code:
grep test /tmp/myfile > /dev/null 2>&1 # output not required
if [ $? -eq 0 ]
then
  echo "Pattern found in file"
else
  echo "Pattern not found"
fi
Putting your commands in a script:

Code:
#!/bin/bash

sum dkmscheck rmkern libbash > /tmp/my_file_sums_$(date +%F)

cp -f rmkern /opt/gsctools/bin
chmod 700 /opt/bin/rmkern

cp -f dkmscheck /opt/bin
chmod 700 /opt/bin/dkmscheck

mkdir p /opt/lib/shell
cp -f libbash /opt/lib/shell
chmod 700 /opt/lib/shell/libbash
.. should get you started

cheers,

kbp
 
Old 09-01-2009, 02:48 AM   #3
chrism01
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Registered: Aug 2004
Location: Sydney
Distribution: Centos 6.9, Centos 7.3
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You may want to bookmark these links:
http://rute.2038bug.com/index.html.gz
http://tldp.org/LDP/Bash-Beginners-G...tml/index.html
http://www.tldp.org/LDP/abs/html/
 
Old 09-02-2009, 09:12 AM   #4
sk185094
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Registered: Apr 2009
Posts: 2

Original Poster
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Smile Thanks

Thansk KB, I will give it try.
 
  


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