12-08-2011
You can check the roots privileges by testing EUID. If EUID==0, then the caller has roots powers.
Check if the account exists: look at /etc/passwd. You can see all users there. /etc/groups stores the groups.
Lock/unlock: create a lock file and test for its existence. You can then even gather other interesting info, like when the user invoked your script (timestamp of lockfile).
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1. UNIX for Dummies Questions & Answers
#!/usr/bin/sh
echo "Enter reason:"
echo "> \c"
read $reason
$reason >> access.log
This doesnt work for me. Can someone tell me how I would read the input from what the person types, and then append that to the log file?
Regards (2 Replies)
Discussion started by: alwayslearningunix
2 Replies
2. Shell Programming and Scripting
Hi guys ,
As you know normally ' read ' statement waits
for the user to press enter and then terminates
the input .............
Can anyone of u tell me how do i read a
single character from input without waiting
for the user to press enter ................
Thanks,
Nagesh. (1 Reply)
Discussion started by: nageshrc
1 Replies
3. UNIX for Dummies Questions & Answers
I would like to prompt for input and then use it as a variable in a script.
Something like this.
#!/bin/ksh
echo "What is your name?: \c"
read response
echo "Your name is $reply" >file.txt
done
exit 0
What am I missing?
Thanks, (7 Replies)
Discussion started by: darthur
7 Replies
4. Shell Programming and Scripting
#!/bin/sh
rpt="/export/home/legato/rpt_offsite"/test_eject.tape
cat <$rpt
while read line
do
echo $line
perform routine
done
I am trying to read the contents of this file line by line and perform a routine for each line read.
The file contents are numbers..
What is wrong with my... (1 Reply)
Discussion started by: gzs553
1 Replies
5. Shell Programming and Scripting
Hi guys,
I am new to AWK and unix scripting. Please see below my problem and let me know if anyone you can help.
I have 2 input files (example given below)
Input file 2 is a standard file (it will not change) and we have to get the name (second column after comma) from it and append it... (5 Replies)
Discussion started by: sksahu
5 Replies
6. Shell Programming and Scripting
Can I do something like,
if($0==/^int.*$/) {
print "Declaration"
}
for an input like: int a=5;
If the syntax is right, it is not working for me, but I am not sure about the syntax. Please help.
Thanks,
Prasanna (1 Reply)
Discussion started by: prasanna1157
1 Replies
7. Shell Programming and Scripting
Alright, so the goal of my script is to read text from standard input and store it into a file using the ex-editor:
so far i've got this, but it doesn't work.
#!/bin/s
read text
ex $1 >> HERE
text
HERE
I don't get any errors either, so i don't know what i'm doing wrong. (7 Replies)
Discussion started by: Bertieboy7
7 Replies
8. Shell Programming and Scripting
This is one of the strangest things that's happening to me.
I'm writing a new Perl script that is trying to read a file.
The file is originally in .mof format, but I also saved the contents into a .txt file.
As a simple test, I wrote this:
#!/user/bin/perl -w
use strict;
... (3 Replies)
Discussion started by: kooshi
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9. Shell Programming and Scripting
I need to create a bash array from the command line parameters. I only know how to do it when I know the number of parameters. But what do I do when I dont know the number of parameters? (1 Reply)
Discussion started by: locoroco
1 Replies
10. Shell Programming and Scripting
Hi folks..
i got a requirement to red multiple directories from STDIN and store them to a variable.
ex:-
echo "Enter directory to add:"
echo " Enter directory to add:"
read value till there is input and when there is no input close the read loop and store variable into an array
... (1 Reply)
Discussion started by: bangaram
1 Replies
LEARN ABOUT CENTOS
service
service(8) System Manager's Manual service(8)
NAME
service - run a System V init script
SYNOPSIS
service SCRIPT COMMAND [OPTIONS]
service --status-all
service --help | -h | --version
DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
directory set to /.
The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the
invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and
stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start
command.
service --status-all runs all init scripts, in alphabetical order, with the status command.
If the init script file does not exist, the script tries to use legacy actions. If there is no suitable legacy action found and COMMAND is
one of actions specified in LSB Core Specification, input is redirected to the systemctl. Otherwise the command fails with return code 2.
FILES
/etc/init.d
The directory containing System V init scripts.
ENVIRONMENT
LANG, TERM
The only environment variables passed to the init scripts.
SEE ALSO
chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5)
Jan 2006 service(8)