Bash: evaluating $? variable (if statement) Post: 302212596

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

K Shell evaluating value to a variable

Hi, I have the following requirement. V="First" R="V" echo $$R The output should be First. How do i achieve this. how do we evaluate the $R and evaluate it to $V as $R contains V and $V is First. Thanks Vijay

2. UNIX for Dummies Questions & Answers

Conditional statement in bash

I want to combine 2 conditional statements by using -o in bash, but it won't work. if ; then echo "The number needs to be between 0 and $nr" fi Each time i execute the file it says: ./selectCitaat: line 10: syntax error near unexpected token `$1'

3. Shell Programming and Scripting

Evaluating a variable

Does anyone know of a way to force a variable name held in another variable to return the value of the first variable? Best if I give an example, that does not work: /usr/local/bin >cat mike.sh NUM1ref=16 NUM2ref=32 echo "==============" for VAR in NUM1 NUM2 do XXXX=${VAR}ref echo $XXXX...

4. Shell Programming and Scripting

evaluating a variable inside a variable

Hi there, i think im getting myself a little confused and need some help :wall: I am reading in a bunch of variables to my script from an external file and need to validate that a value has been set for each so if you can imagine, the user is required to pass in 4 values...

5. UNIX for Dummies Questions & Answers

Parsing file, reading each line to variable, evaluating date/time stamp of each line

So, the beginning of my script will cat & grep a file with the output directed to a new file. The data I have in this file needs to be parsed, read and evaluated. Basically, I need to identify the latest date/time stamp and then calculate whether or not it is within 15 minutes of the current...

6. Shell Programming and Scripting

bash if statement help needed

Hi I need a script with an if statement that goes. I need it to search through all files within a directory with the extension .test if it finds the string '71502FSC1206' then do sed 's/71502FSC1206/\n&/g' > send.test If it finds the string '715MCH' or '715JAC' then I need it to move the...

7. UNIX for Dummies Questions & Answers

Bash - OR within an IF statement

Hey guys, Currently trying to write a wee script that runs only when logged in as one of two users. The rest of the script is working fine, but no matter what user I try to run it as, it always fails! This is the puzzling part:if ]; then echo "Run script as admin " exit 1 else...

8. Shell Programming and Scripting

BASH - case statement

Hi Gurus, I have the below BASH code which does not works for upper case alphabets except Z (upper case Z). What may be the reason. Also escape sequences like \n, \t, \b, \033(1m \033(0m (For bold letter) are not working. case $var in ) echo "Lower case alphabet" ;; ...

9. Shell Programming and Scripting

[Solved] If statement in bash

I have the following code in bash, however "set red frmt" is not displayed. echo "iarg_rd = $iarg_rd" iarg_rd="2" if ; then echo "Hello World" fi if ; then frmt="${gap}${!frmt_titl_yl}" elif ; then frmt="${gap}${!frmt_titl_bk}" elif ; then echo...

10. UNIX for Dummies Questions & Answers

Bash statement equivalent

Hi all, i need a equivalent for the statement i run in bash, so it would also run in other shells. Specially i need it for ksh to run on AIX. Here the statements: exec > >(tee -a $log) exec 2> >(tee -a $log >&2) Thanks.

LEARN ABOUT FREEBSD

kenv

KENV(1) 						    BSD General Commands Manual 						   KENV(1)

NAME

     kenv -- dump or modify the kernel environment

SYNOPSIS

     kenv [-hNq]
     kenv [-qv] variable[=value]
     kenv [-q] -u variable

DESCRIPTION

     The kenv utility will dump the kernel environment if invoked without arguments.  If the -h option is specified, it will limit the report to
     kernel probe hints.  If an optional variable name is specified, kenv will only report that value.	If the -N option is specified, kenv will
     only display variable names and not their values.	If the -u option is specified, kenv will delete the given environment variable.  If the
     environment variable is followed by an optional value, kenv will set the environment variable to this value.

     If the -q option is set, warnings normally printed as a result of being unable to perform the requested operation will be suppressed.

     If the -v option is set, the variable name will be printed out for the environment variable in addition to the value when kenv is executed
     with a variable name.

     Variables can be added to the kernel environment using the /boot/loader.conf file, or also statically compiled into the kernel using the
     statement

	   env filename

     in the kernel config file.  The file can contain lines of the form

	   name = value # this is a comment

     where whitespace around name and '=', and everything after a '#' character, are ignored.  Almost any printable character except '=' is
     acceptable as part of a name.  Quotes are optional and necessary only if the value contains whitespace.

SEE ALSO

     kenv(2), config(5), loader.conf(5), loader(8)

HISTORY

     The kenv utility appeared in FreeBSD 4.1.1.

BSD
								   May 11, 2012 							       BSD

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

K Shell evaluating value to a variable

Discussion started by: vijaykrc

2. UNIX for Dummies Questions & Answers

Conditional statement in bash

Discussion started by: doc.arne

3. Shell Programming and Scripting

Evaluating a variable

Discussion started by: mikejordan

4. Shell Programming and Scripting

evaluating a variable inside a variable

Discussion started by: rethink