|
|
Sponsored Content
Homework and Emergencies
Homework & Coursework Questions
Bash if and loops help
Post 302513280 by Corona688 on Tuesday 12th of April 2011 06:38:29 PM
|
|
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hi guys,
i have an array called ARRAY which has elements in it... i am trying to assign elements of ARRAY to master_array..
i get a =: command not found error..
i=0
while
do
${master_array}=${ARRAY}
((i++))
done
is there something i am missing? (4 Replies)
Discussion started by: npatwardhan
4 Replies
2. Shell Programming and Scripting
Hi!
Could someone explain me why the below code is printing the contents of IF block 5 times instead of 0?
#!/bin/bash
VAR1="something"
VAR2="something"
for((i=0;i<10;i++))
do
if(($VAR1=~$VAR2))
then
echo VAR1: $VAR1
echo... (3 Replies)
Discussion started by: machinogodzilla
3 Replies
3. Shell Programming and Scripting
Hey guys,
I'm kinda a noob at scripting. I am trying to create a script that uses multiple for loops with the lsiutility to monitor disk health on a system.
The script runs, but it will continually echo an infinite number of LogVolumes when there are only 2 per virtual disk on my server. It's... (2 Replies)
Discussion started by: tank126
2 Replies
4. UNIX for Dummies Questions & Answers
Hello All,
i have a really strange copy paste problem. When I write some loops in an editor for example:
for j in 1 2 3
do
echo "$j"
done
and I want to paste it to the shell, the result in the shell is:
for j in 1 2 3; do e;
other commands work fine and if a copy paste... (4 Replies)
Discussion started by: creamcheese
4 Replies
5. UNIX for Dummies Questions & Answers
Hi All,
I've been researching this problem and I am pretty sure that the issue is related to the while loop and the piping. There are plenty of other threads about this issue that recommend removing the pipe and using redirection. However, I haven't been able to get it working using the ssh and... (1 Reply)
Discussion started by: 1skydive
1 Replies
6. Shell Programming and Scripting
Hi,
This is probably going to be very simple but i came across something i can't quite explain. Here is the situation: i have a list of files, which i'd like to process one by one (get the size, make some tests, whatever) and generate some statistics using different variables.
Something... (5 Replies)
Discussion started by: m69w
5 Replies
7. Shell Programming and Scripting
hello
i'm writing a script and I want to use a for loop inside a while loop as following:
while read line;
do
echo $line
for i in $vrm;
do
echo $i
done
done < './contacts'
when i use just the while loop it prints the lines from file ./contacts just... (13 Replies)
Discussion started by: vlm
13 Replies
8. Shell Programming and Scripting
What is the proper way to run two bash loops in the same command? The two below loops run separately, the problem is when I pipe them I get an error that the file used for the second loop does not exist. I am not sure how to wait for the first loop to complete and then start the second. Thank... (10 Replies)
Discussion started by: cmccabe
10 Replies
9. Shell Programming and Scripting
Hello,
Below I try to control that the input is good an IP :
#!/bin/bash
cp /home/scripts/choice_interfaces.txt /home/scripts/interfaces.txt
chmod 644 /home/scripts/interfaces.txt
echo -e "Please enter the network informations into the /etc/network/interfaces file, complete them below... (9 Replies)
Discussion started by: Arnaudh78
9 Replies
10. Shell Programming and Scripting
I have 3 loops that I use to determine the permission level of AWS user accounts.
This array lists the AWS policy ARN (Amazon Resource Name):
for ((policy_index=0;policy_index<${#aws_managed_policies};++policy_index)); do
aws_policy_arn="${aws_managed_policies}"
... (1 Reply)
Discussion started by: bluethundr
1 Replies
LEARN ABOUT LINUX
tr
TR(1) User Commands TR(1) NAME
tr - translate or delete characters SYNOPSIS
tr [OPTION]... SET1 [SET2] DESCRIPTION
Translate, squeeze, and/or delete characters from standard input, writing to standard output. -c, -C, --complement use the complement of SET1 -d, --delete delete characters in SET1, do not translate -s, --squeeze-repeats replace each input sequence of a repeated character that is listed in SET1 with a single occurrence of that character -t, --truncate-set1 first truncate SET1 to length of SET2 --help display this help and exit --version output version information and exit SETs are specified as strings of characters. Most represent themselves. Interpreted sequences are: NNN character with octal value NNN (1 to 3 octal digits) \ backslash a audible BEL backspace f form feed new line return horizontal tab v vertical tab CHAR1-CHAR2 all characters from CHAR1 to CHAR2 in ascending order [CHAR*] in SET2, copies of CHAR until length of SET1 [CHAR*REPEAT] REPEAT copies of CHAR, REPEAT octal if starting with 0 [:alnum:] all letters and digits [:alpha:] all letters [:blank:] all horizontal whitespace [:cntrl:] all control characters [:digit:] all digits [:graph:] all printable characters, not including space [:lower:] all lower case letters [:print:] all printable characters, including space [:punct:] all punctuation characters [:space:] all horizontal or vertical whitespace [:upper:] all upper case letters [:xdigit:] all hexadecimal digits [=CHAR=] all characters which are equivalent to CHAR Translation occurs if -d is not given and both SET1 and SET2 appear. -t may be used only when translating. SET2 is extended to length of SET1 by repeating its last character as necessary. Excess characters of SET2 are ignored. Only [:lower:] and [:upper:] are guaranteed to expand in ascending order; used in SET2 while translating, they may only be used in pairs to specify case conversion. -s uses SET1 if not translating nor deleting; else squeezing uses SET2 and occurs after translation or deletion. AUTHOR
Written by Jim Meyering. REPORTING BUGS
Report tr bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report tr translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for tr is maintained as a Texinfo manual. If the info and tr programs are properly installed at your site, the com- mand info coreutils 'tr invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 TR(1)