How to redirect the messages from the script to console in Linux?
Code:
msg.sh
#!/bin/bash
if [ -e /user/script/$start.sh]
then
echo "starting service"
else
echo " service not started"
echo " Please check the start.sh file or manuly start the service"
fi
if i login with root credentials @12.36.34.123 with passwd
username:root
passwd:abc
once i login into linux pc on console the above messages should be availble like below: what coomand i need to use in linux to display the messages in consloe from the script ?
output:
:/ #
service not started
Please check the start.sh file or manuly start the service
msg.sh
#!/bin/bash
if [ -e /user/script/$start.sh]
then
echo "starting service"
else
echo " service not started"
echo " Please check the start.sh file or manuly start the service"
fi
if i login with root credentials @12.36.34.123 with passwd
username:root
passwd:abc
once i login into linux pc on console the above messages should be availble like below: what coomand i need to use in linux to display the messages in consloe from the script ?
output:
Code:
:/ #
service not started
Please check the start.sh file or manuly start the service
Didn't you get some output from bash like?:
Code:
bash: [: missing `]'
Where is the variable start defined? (Did you intend to say start.sh instead of $start.sh?)
There has to be a space between /user/script/$start.sh (or /user/script/start.sh) and ].
yes , i am getting the output when i run my script : my script is working and it is giving the below output and cron job i sheduled every week.
output:
Code:
service not started
Please check the start.sh file or manuly start the service
the problem is once the script run's some time it will start service or it will tell service is not started.
my requirement is whenever i login that linux the output messages should be print in console. what command i need to redirect the output to console .
whenever i login the linux i want to see the output
Code:
service started
or
Code:
service not started
Please check the start.sh file or manuly start the service
---------- Post updated at 03:07 AM ---------- Previous update was at 01:27 AM ----------
how to get the outout from script to console.
i am running one script msg.sh using cron job every suday midnight. as soon as i logged in i want to see the staus is service started or service failed on console.
what command i need to add to script ?
msg.sh
Code:
#!/bin/bash
if [ -e /user/script/$start.sh]
then
echo "starting service"
else
echo " service not started"
echo " Please check the start.sh file or manuly start the service"
fi
if i login with root credentials @12.36.34.123 with passwd
Code:
username:root
passwd:abc
i once i logged in linux service started or service failed ( out put of the script ) should be printed on console.
how to check or how to extract messages in linux from var/log/message to current console
Last edited by Don Cragun; 11-12-2014 at 01:54 PM..
Reason: Add CODE and ICODE tags again.
Getting your act together BEFORE you post would definitely help us help you.
Trying to boil down what you said:
You have a script, verified it is well-behaved when started from the command line, run it from cron at Sunday midnight and want to see its output when logging in next time?
Per default, cron will mail a job's output to the respective user. So, you could check your mails at login and find the desired output.
If you want it displayed at login, have cron write a logfile, eventually to your HOME directory, and in your shell's startup/login script, use e.g. cat or more / less to output it to your terminal (which I guess is what you mean by "console").
What will show up in /var/log/messages related to your job will be sth like
Code:
cron[1150]: Job `cron.daily' started
unless you use e.g. logger in your script to explicitely log it to the system logs.
You are already doing 'send the msg on console/terminal'.
In which case, you could execute this 'msg.sh' script at login.
For a bash based linux, this could be in: $HOME/.bashrc (note the . before the name)
Or do you ment to write to the logs?
Which in case of a regular service should already be done - see journalctl (1) for more details.
Otherwise you could always redirect your output to a file, which you can read at any time later.
To overwrite existing content:
Please look at post #2 in this thread. You seem to have ignored everything I asked.
Change your script to the following and run it from the command line (not from cron):
Code:
#!/bin/bash
printf 'start is set to "%s"\n' "$start"
ls -l /user/script/$start.sh /user/script/start.sh
echo "running $0"
if [ -e /user/script/$start.sh ]
then
echo "starting service"
else
echo " service not started"
echo " Please check the start.sh file or manually start the service"
fi
Note that I added the space in your [ command that I told you had to add before. Without that space, your syntax error guarantees that the then clause in your if statement will NEVER be executed.
Then notice that there is absolutely nothing in your script that will start anything! You check to see if a file exists (and, by convention, it looks like that file is a shell script), but if that file does exist, there is no attempt to execute it. If you were ever to execute the command:
Code:
echo "starting service"
it would be reporting a lie. This script never makes any attempt to start anything even after the syntax error is corrected!
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what command i need to add to script ?
msg.sh
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