problem with while loop in BASH shell Post: 302256260

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I'm just trying to make a script that runs in command line to echo each line in a text file. Everything i found on google is telling me to do it like this but when I run it it just echos removethese.txt and thats it. Anyone know what im doing wrong? for i in removethese.txt; do echo $i; done ...

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Bash while loop problem

Hi, I'm having a problem with the while loop in bash. I try the following script: #!/bin/bash while true do echo "test" done When I try this, it gives me this error: while: Too few arguments. What am I doing wrong? Thanks

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i have this code for a simple if loop: #!/bin/bash array="1 2 3 4 5" array2="5 6 7 8 9" if } -gt ${array} ]; then echo "${array2} is greater than ${array}!!" fi the error is ./script8: line 9: [: too many arguments ./script8: line 9: [: too many arguments ./script8: line 9: [:...

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Anyone know?: How the 'for'-loop could stop working in interactive bash shell?!

It is happening with my sessions already second time: a 'for'-loop for some reason stop to work as expected. That means or it is looping without exitting, or it is not loop even once. Here example of my try when it is not processing even one loop. You can see, I start new subshell and...

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hi i was trying to optimize one script and i came across this problem .. i am putting some pseudo code here $ >cat a.sh ls | while read I do i=$(($i + 1)) done echo "total no of files : " $ >ksh a.sh total no of files : $ >bash a.sh total no of files : why is...

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I'm trying to do a script where I want to see if all users home directories are only writable by owner. However, in my script I do not know how to implement the for loop so that all directories are checked. In mine, I am only checking the permissions for the first directory found. I do know that a...

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problem access array outside of loop in bash

Below is a test script I was trying to use so that I could understand why the logic was not working in a larger script. While accessing and printing array data inside the while loop, everything is fine. Outside the loop, i guess everything is null?? The for loop that is meant to cycle...

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Hello, I am trying to create a matrix of 0's and 1's depending on whether a gene and sample name are found in the same line in a file called results.txt. An example of the results.txt file is (tab-delimited): Sample1 Gene1 ## Gene2 ## Sample2 Gene2 ## Gene 4 ## Sample3 Gene3 ...

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For loop in bash shell

Hi, I am using a for loop to manipulate files data_1.txt through data_100.txt. The for-loop is set up like this: for i in {1..100}; do cut -f1 data_$i.txt > output$i.txt I get the following error message when I run the code: cannot open `data.txt' for reading: No such file or directory...

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Bash Shell loop - Help !

Dear all Linux lover, I am a new learner to Bash Shell script and I would like to writing a script to to repeat my script. This mean I would like to have multiple same of result after running the .sh. ####### TIMES_NO=0 echo -n "Please enter the number for times to repeat ?" read...

LEARN ABOUT SUSE

tping

TPING(1)							   LAM COMMANDS 							  TPING(1)

NAME

       tping - Send echo messages to LAM nodes.

SYNOPSIS

       tping [-hv] [-c count] [-d delay] [-l length] nodes

OPTIONS

       -h	     Print the command help menu.

       -v	     Turn OFF verbose mode.

       -c count      Send count messages.

       -d delay      Delay delay seconds between each message.

       -l length     Each message is length bytes long.

DESCRIPTION

       The  tping  command  sends  messages  to,  and  collects replies from, a list of nodes, via the LAM echo server.  It is similar to the UNIX
       ping(8) command, and is used as a quick diagnosis of the LAM network.

       Unless options are specified, tping sends a 1 byte message an infinite number of times, displaying the roundtrip time of each message as it
       completes,  with  a delay of 1 second between roundtrips.  After the loop is broken (with keyboard interrupt, eg: ^C), tping prints statis-
       tics about all roundtrip messages.

EXAMPLES

       tping h
	   Echo messages to the local node.

       tping -v n7 -l 1000 -c 10
	   Echo 1000 byte messages to node 7.  Stay silent while working.  Stop after 10 roundtrips and report statistics.

BUGS

       There is no built-in timeout and tping will wait forever to receive an echo.  If no echo is received, due to a dead  link  or  node,  tping
       hangs.	Stop  the  process  with  a  keyboard suspend signal (eg: ^Z) and terminate LAM with lamhalt(1) or lamwipe(1) (although the use of
       lamwipe(1) is deprecated).

SEE ALSO

       lamhalt(1), lamwipe(1)

LAM 7.1.4							    July, 2007								  TPING(1)

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1. Shell Programming and Scripting

Simple bash for loop problem

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if loop not working in BASH shell

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Anyone know?: How the 'for'-loop could stop working in interactive bash shell?!

Discussion started by: alex_5161