12-26-2015
And that post processing that Don used is an example of what you can do with
Parameter Substitution. There are many other ways you can carve a piece of information out of a string, without the need of invoking an external program, which it will always be slower that using the built-in shell functionalities.
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1. Shell Programming and Scripting
Hi,
I have this following script below. Its searching a log file for 2 string and if found then write the strings to success.txt and If not found write strings to failed.txt . if one found and not other...then write found to success.txt and not found to failed.txt.
I want to optimize this... (3 Replies)
Discussion started by: amitrajvarma
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2. Shell Programming and Scripting
can we optimize this command ?
sed 's#AAAA##g' /study/i.txt | sed '1,2d' | tr -d '\n\' > /study/i1.txt;
as here i am using two files ...its overhead..can we optimise to use only 1 file
sed 's#AAAA##g' /study/i.txt | sed '1,2d' | tr -d '\n\' > /study/i.txt;
keeping them same but it... (9 Replies)
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3. Shell Programming and Scripting
#!/usr/bin/perl
use strict;
use warnings;
use Date::Manip;
my $date_converted = UnixDate(ParseDate("3 days ago"),"%e/%h/%Y");
open FILE,">$ARGV";
while(<DATA>){
my @tab_delimited_array = split(/\t/,$_);
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4. Shell Programming and Scripting
Pl help to me to write the below code in a simple way ...
i suupose to use this code 3 to 4 places in my makefile(gnu) ..
****************************************
@for i in $(LIST_A); do \
for j in $(LIST_B); do\
if ;then\
echo "Need to sign"\
echo "List A = $$i , List B =$$j"\
... (2 Replies)
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5. Shell Programming and Scripting
Hi,
I have to assign a value for a varaiable based on a Input. I have written the below code:
if
then
nf=65
elif
then
nf=46
elif
then
nf=164
elif
then
nf=545
elif
then
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elif
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6. Shell Programming and Scripting
Here is my code. What it does is it reads an input file (input.txt which contains roughly 2,000 search phrases) and searches a directory for files that contains the search phrase. The directory contains roughly 1900 files and 84 subdirectories. The output is a file (output.txt) that shows only the... (23 Replies)
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7. Shell Programming and Scripting
WARNING=${1}
CRITICAL=${2}
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V = $2
R = $0
} END {
for ( i = 1; i <= n; i++) {
if((V > 0) && (V < V))
print R, ((V - V) / V) * 100
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... (6 Replies)
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8. Shell Programming and Scripting
Hello,
I'm wondering if there is a quicker way of doing this.
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9. Shell Programming and Scripting
sample data.file:
0,mfrh_green_screen,1454687485,383934,/PROD/G/cicsmrch/sys/unikixmain.log,37M,mfrh_green_screen,28961345,0,382962--383934
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10. Shell Programming and Scripting
Hi All,
I have written a new script to check for DB space and size of dump log file before it can be imported into a Oracle DB.
I'm relatively new to shell scripting.
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RBASH(1) General Commands Manual RBASH(1)
NAME
rbash - restricted bash, see bash(1)
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO
bash(1)
GNU Bash-4.0 2004 Apr 20 RBASH(1)