As Scrutinizer mentioned, with bash the commands after the pipe run in a subshell and variables in a subshell are not visible outside the block of code in the subshell and they are not accessible to the parent process.
You can avoid the use of a pipe (and useless use of cat) like:
my input file contains thousands of lines like below
234A dept of education
9788 dept of commerce
8677 dept of engineering
How do i add a delimeter ':' after FIRST 4 CHARACTERS in a line
234A:dept of education
9788:dept of commerce
8677:dept of engineering (7 Replies)
Hi All,
I am comparing two strings inside an if condition if the strings are same then it should go inside the loop else it should execute code given in else part.
But there is a but inside my script
Even if the if condition is true
it is not going inside the loop also it is executing... (4 Replies)
Hi All,
I need to concatenate the values in the array into a variable. Currently the code is :
for (( i=1 ; i <= $minCount ; i++ ))
do
var="${var}""${sample_file}"
done
The output is :
/tmp/1/tmp/2/tmp/3/tmp/4/tmp/5/tmp/6/tmp/7/tmp/8/tmp/9/tmp/10
I need a space between... (1 Reply)
Hi,
In the code included below, the string comparision is not working fine. Please help
while (( find_out >= i ))
do
file=`head -$i f.out|tail -1`
dir=`dirname $file`
cd $dir
Status=""
if ; then
Status=`cvs -Q status... (3 Replies)
The string comparison highlighted below is not working fine. Please help:
while read line
do
# Get File name by deleting everything that preceedes and follows Filename as printed in cvs status' output
f_name=`echo $line | sed -e 's/^File://' -e 's/ *Status:.*//' | awk '{print $NF}'`
... (4 Replies)
Hi there,
I'm writing a basic script where I want to make a string of 2 numeric fields from a file, which I have done, but the behavior is rather confusing.
I have a file of random values such as:
1 2
3 4
5 6
7 8
9 10
and my awk code is:
BEGIN { FS = " " }
{ str = str $1 $2 }
END {... (7 Replies)
Hello
I want to achieve the following.
However the concatenation is not working
mv `ls -ltr *myfile*.log|awk '{print $9}'` `ls -ltr *myfile*.log|awk '{print `date +'%d%m%y%k%M%S'` $9}'`
I tried
awk '{x=`date +'%d%m%y%k%M%S'` print $x "" $9}'
awk '{x=`date +'%d%m%y%k%M%S'`... (2 Replies)
Hi Team!!
Please can anyone tell me why the following line does not work properly?
str3+=$str2
it seems that str3 variable does not keep its value in order to be concatenated in the next iteration! Thus when i print the result of the line above it returns the str2 value
What i want to do is to... (8 Replies)
I have a script which is migrated from AIX to Linux & now while running it is no able to concatenate string values
The string concatenation step under while loop is not displaying desired result
Please find below the piece of code:
while read EXT_FILE ; do
EXT_FILE=$EXT_FILE.ext.sent
echo... (7 Replies)
Discussion started by: PreetArul
7 Replies
LEARN ABOUT CENTOS
grub2-mkrescue
GRUB-MKRESCUE(3) Library Functions Manual GRUB-MKRESCUE(3)NAME
grub-mkrescue -- Generate a GRUB rescue image using GNU Xorriso.
SYNOPSIS
grub-mkrescue [-o | --output=FILE] [--modules=MODULES]
[--install-modules=MODULES] [--themes=THEMES]
[--fonts=FONTS] [--locales=LOCALES]
[--compress[=no,xz,gz,lzo]] [-d | --directory=DIR]
[--grub-mkimage=FILE] [--rom-directory=DIR]
[--xorriso=FILE] [--grub-glue-efi=FILE]
[--grub-render-label=FILE] [--label-font=FILE]
[--label-color=COLOR] [--label-bgcolor=FILE]
[--product-name=STRING] [--product-version=STRING]
[--sparc-boot] [--arcs-boot]
DESCRIPTION
grub-mkrescue can be used to generate a rescue image with the GRUB bootloader.
OPTIONS --output=FILE
Write the generated file to FILE. The default is to write to standard output.
--modules=MODULES
Pre-load modules specified by MODULES.
--install-modules=MODULES
Install only MODULES and their dependencies. The default is to install all available modules.
--themes=THEMES
Install THEMES. The default is to install the starfield theme, if available.
--fonts=FONTS
Install FONTS. The default is to install the unicode font.
--locales=LOCALES
Install only locales listed in LOCALES. The default is to install all available locales.
--compress[=no,xz,gz,lzo]
Compress GRUB files using the specified compression algorithm.
--directory=DIR
Use images and modules in DIR.
--grub-mkimage=FILE
Use FILE as grub-mkimage(1). The default is /usr/bin/grub-mkimage.
--rom-directory=DIR
Save ROM images in DIR.
--xorriso=FILE
Use FILE as xorriso.
--grub-glue-efi=FILE
Use FILE as grub-glue-efi(3).
--grub-render-label=FILE
Use FILE as grub-render-label(3).
--label-font=FILE
Use FILE as the font file for generated labels.
--label-color=COLOR
Use COLOR as the color for generated labels.
--label-bgcolor=COLOR
Use COLOR as the background color for generated labels.
--product-name=STRING
Use STRING as the product name in generated labels.
--product-version=STRING
Use STRING as the product version in generated labels.
--sparc-boot
Enable booting the SPARC platform. This disables HFS+, APM, ARCS, and "boot as disk image" on the i386-pc target platform.
--arcs-boot
Enable ARCS booting. This is typically for big-endian MIPS machines, and disables HFS+, APM, sparc64, and "boot as disk image" on
the i386-pc target platform.
-- All options after a -- will be passed directly to xorriso's command line when generating the image.
SEE ALSO
info grub
Wed Feb 26 2014 GRUB-MKRESCUE(3)