work for a small ISP (Internet Service Provider) and we are using Linux and Unix-like operating system with bash shell. I want to write a shell script to parse the csv file line by line. Then line must be parse again field by field. The sample input file is as follows:
I need to extract each of these example.com,username,groupname,homedir,md5password,permission,secondarygroup fields and passed to the different system utilities. How do I write a shell script to automate this task and use the bash shell to parse a text file?
How can I convert newline [ line break or end-of-line (EOL) character ] between Unix and Windows text files?
I noticed that many shell scripts in /etc/init.d/ directory use the following syntax:
echo $“Usage $prog start|stop|reload|restart”
Why a double-quoted string preceded by a dollar sign ($”string”) using the echo command under Linux / UNIX bash scripts?
I wish I had access to one of those nifty UNIX command-line tools under MS-Windows Vista or XP operating systems. How do I access UNIX command line utilities under Windows with out using virtualization?
ow do I view and set date under UNIX operating systems? How do I see the current time/date on Unix based server?
Q. How do I kill a process called inetd or foo and restart the same so that configuration file get updated?
A. Both UNIX and Linux supports POSIX reliable signals and POSIX real-time signals. Each signal has a current disposition, which determines how the process behaves when it is delivered the signal.
Generally following command is used
kill -1 process-pid
First get pid of inetd:
ps -e | grep inetd
Now force read inetd.conf:
kill -1 xinetd-pid
You can also use pkill command used to send signals. The pkill command allows the use of extended regular expression patterns and other matching criteria.
pkill -HUP process-name
Make syslog reread its configuration file
# pkill -HUP syslogd
Make xinetd reread its configuration file
# pkill -HUP inetd