1. Shell Programming and Scripting

So in my shell i execute: { while true; do echo string; sleep 1; done } | read line This waits one second and returns. But { while true; do /bin/echo string; sleep 1; done } | read line continues to run, and doesn't stop until i kill it explicitly. I have tried this in bash as well as zsh,... (2 Replies)

2. UNIX for Dummies Questions & Answers

Is there a command where I can pipe my grep into it and it will output it with spaces rather than returns? Example I want to turn prompt$ grep blah file blah blah into this prompt$ grep blah file | someCommand blah blah (1 Reply)

3. UNIX for Dummies Questions & Answers

Bit of a weird one i suppose, i want to use an echo inside an echo... For example... i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos... echo "echo "hello"" >$file echo "echo "goodbye"" >$file ... (3 Replies)

4. UNIX for Dummies Questions & Answers

Hi, How do you echo something once when a find statement returns null results? This is when using mutiple locations and mutiple arguments. The below find command the inner loop of a nested for loop where the outter loop holds the $args and the inner loop holds the locations. find... (2 Replies)

5. Shell Programming and Scripting

Hi all, I am trying to grep a .txt file for a word. When I hit enter, it returns back to $ The file is 4155402 in size and is named in this way: *_eveningtimes_done_log.txt I use this command, being in the same directory as the file: grep -i "invalid" *_eveningtimes_done_log.txt ... (16 Replies)

6. Shell Programming and Scripting

echo `echo ` doesn't echoes anything. And it's logic. But echo `echo `echo ` ` does echoes "echo". What's the logic of it? the `echo `echo ` inside of the whole (first) echo, echoes nothing, so the first echo have to echo nothing but echoes "echo" (too much echoing :P):o (2 Replies)

7. Shell Programming and Scripting

I have been experiencing this problem intermittantly, I thought the problem was '/bin/sh -> /bin/dash' but I changed that to bash and the problem persists. I am writing functions to be included in user's '.bash_profile' through source or '.' filename a quick example of the problem is illustrated... (3 Replies)

8. Shell Programming and Scripting

Hi, I develop simple animation ping script on Solaris Platform. It is like Cisco ping. Examples and source code are below. bash-3.00$ gokcell 152.155.180.8 30 Sending 30 Ping Packets to 152.155.180.8 !!!!!!!!!!!!!.!!!!!!!!!!!!!!!. % 93.33 success... % 6.66 packet loss...... (1 Reply)

9. Shell Programming and Scripting

Hi I am using perl to ping a list of nodes - with script below : $p = Net::Ping->new("icmp"); if ($p->ping($host,1)){ print "$host is alive.\n"; } else { print "$host is unreacheable.\n"; } $p->close();... (4 Replies)

10. Programming

help with bash script! im am working on this script to make sure my server will stay online, so i made this script.. HOSTS="192.168.138.155" COUNT=4 pingtest(){ for myhost in "$@" do ping -c "$COUNT" "$myhost" &&return 1 done return 0 } if pingtest $HOSTS #100% failed... (4 Replies)