New to shell script and lost....


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers New to shell script and lost....
# 1  
Old 10-16-2008
New to shell script and lost....

I am really stuck on something I am sure you all will find simple.
I am VERY new to shell scripting and I am trying to figure out how to do a or statement below. So if it = 11 or 31 then...



if [ $? != '11' ]; then

Please keep in mind I do not know much on shell scripting and thank you in advance as I learn.

Last edited by LRoberts; 10-16-2008 at 12:47 PM..
# 2  
Old 10-16-2008
hi ,
please note the syntax changes per shell , you have not mentioned the shell
i will tell how to do it in ksh

if [ "$x" = "11" ];then
if [ "$x" = "31" ] ;then
<<do something >>> -- atleast 1 statement
else
<< if you want some-thing in else -case >>
fi
fi -- if u want any else case then u can put a else as a layer
# 3  
Old 10-16-2008
Its bash.... I tried what you said but it does not seem to work :-(
# 4  
Old 10-16-2008
$? is the return status of a process or command
Code:
#/bin/ksh
some_command goes here
it=$?
# one way
if [[ $it -eq 31 || $it -eq 11 ]] ; then
# do something
fi
# or this way, preserving the result of the test for further use
test_result=$(( it == 11 | it == 31 ))   #  C boolean operators:  ==, !=, >, >=, etc.
# at this point test_result is either 0 (not true) or 1 (true)

# 5  
Old 10-16-2008
I tried it this way thinking it would work....

if [ $? != '11' ] || [ $? != '31' ]; then


But that did not seem to work. I need to check if the $? is either a 11 or a 31. If its not either one then do action.

I am really lost on the format...
# 6  
Old 10-16-2008
Code:
#!/bin/bash
if [ <comparison 1>  ||  <comparison 2> ] ; then
   # do stuff here if either comparison succeeds
fi

&& is boolean "and" operator || is the "or" operator.
# 7  
Old 10-16-2008
I tried the above way....
it=$?
if [[ $it -eq 11 || $it -eq 31 ] ; then

But I am getting this...

line 23: syntax error in conditional expression
./CheckAutoUpTest: line 23: syntax error near unexpected token `]'
./CheckAutoUpTest: line 23: `if [[ $it -eq 11 || $it -eq 31 ] ; then'
 
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

The Shell lost the inverted comma in a nested ssh command

Hi, i want use this Comand for my psql request sh ssh -o StrictHostKeyChecking=no rootatemailaddress.de sudo psql -U postgres -c "select pg_terminate_backend(pid) from pg_stat_activity where datnam=\'$DB\';"'" but the shell lost the inverted comma for datnam=\'$DB\'. The request deliver... (2 Replies)
Discussion started by: peterpane007
2 Replies

2. Programming

Learning python, lost with script

Hi there, im just having a hard time understanding why this code does not print anything that is suppose to print: score = raw_input ('what is your score? \n') try: if 1.0 == float(score) >= 0.9: print "A" elif 0.9 > float(score) >= 0.8: ... (1 Reply)
Discussion started by: la2015
1 Replies

3. Shell Programming and Scripting

Why commands inside bash script lost effectiveness?

Hi, I have a bash script to run many system commands on CentOS machine, but I am puzzled by some commands had no effect on parent environment. For example, I want to refresh the desktop xdg menu when some processes added or deleted items from desktop xdg menu. If I run "killall gnome-panel"... (4 Replies)
Discussion started by: hce
4 Replies

4. Homework & Coursework Questions

Lost in shell script

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: Hey whats up everyone, Currently I'm stuck. In this question I have to use the following commands test, shift,... (7 Replies)
Discussion started by: AdamSahp
7 Replies

5. Shell Programming and Scripting

Data pipe lost when using ssh in shell script

Hi, I want to do SSH on many different machines and then run some commands on them. A binary application randomly generates IP addresses and my script will take care of doing SSH. $ ./IPGen.exe | ./myScript.sh my script looks like this: while read line; do result1=$(ssh $line... (2 Replies)
Discussion started by: siavash
2 Replies

6. Homework & Coursework Questions

brand new user!.. Lost on BASH script writing

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I have just gotten into writing bash scripts for a class, part of the assignment is to read and be able to tell... (4 Replies)
Discussion started by: Byrang
4 Replies

7. Post Here to Contact Site Administrators and Moderators

My shell pipe 2 multipipes thread is lost ?

Hi, yesterday I have got reply in my thread how to redirect shell pipe to 2 pipes. I would read that answer once again, as my re.re. is also lost Jack (6 Replies)
Discussion started by: jack2
6 Replies

8. UNIX for Advanced & Expert Users

All alias in .profile lost when "script" command is called

Hi, I was trying to call "script <an ip add>" command from .profile file to log everything whenever anyone logs in to this user. I did the following at the end of .profile. 1) Extracted the IP address who logged in 2) Called script < ip add> . The problem I am facing is all, aliases etc. written... (3 Replies)
Discussion started by: amicon007
3 Replies

9. Filesystems, Disks and Memory

Lost Data Lost Admin

First time so excuse my ignorance please. I may not be accurately describing the issue. I have inherited a small lab mostly SUN V120s. We lost power and are trying to recover. Nope no backups... The primary issue I have is 1 box is an Oracle Server. It has 2 36Gb harddrives. I am able to... (3 Replies)
Discussion started by: murphsr
3 Replies
Login or Register to Ask a Question