Tagged Questions
3
votes
4answers
48 views
linux + how to ignore (filter) file with space
Sometimes a file name is created from a couple of names and space between each name as the following:
$ touch "A B C"
$ ls
A B C <-- one file but has three words ! ...
2
votes
1answer
50 views
Deleting a pattern from a file and appending it to the end?
I have a log file which have contents like below:
#SOME MORE DATA
These switches don't have latest images :
SWEs-elmPCI-A-01#
#SOME MORE DATA
These switches don't have latest images :
...
1
vote
4answers
46 views
How can i run a piece of code in background?
Can I run a piece of code in background instead of using another script.
[sesiv@itseelm-lx4151 ~]$ cat ./testback2
#!/bin/bash
start_time=$(date +%s)
for i in {1..5}
do
./testscript &
done
wait
...
0
votes
2answers
51 views
Executing a program according to the last modified date
I need to write a script which would execute some executables in a directory according to the last modified date. The oldest should run first. How do I do it?
This is what I have done so far
for f ...
8
votes
2answers
145 views
how to get exit status from the command before the last
I have solaris machine ( solaris 10 )
please Look on the following simple commands (haconf -makerw | grep -iq "Cluster already writable")
# haconf -makerw
VCS WARNING V-16-1-10364 Cluster ...
0
votes
4answers
47 views
concatenating multiple files with multiple headers
Im trying to concatenate multiple files with multiple headers to have one file with all the information in it for example.
File 1:
Numbers
1
2
3
Letters
A
B
C
File 2:
Numbers
4
5
6
Letters
D
E
...
2
votes
2answers
75 views
How do i know the process ID of the parent process?
I have a script with loop like
while read host
do
./script &
done
I want to know the process id of the current process which is starting the ./script in background and use it in script.
5
votes
4answers
106 views
Check if folder is a mounted remote filesystem
What is the best way (reliable, portable, etc.) to check if a given folder is on a mounted remote (nfs) filesystem within a shell script?
I am looking for a command that would look like:
...
1
vote
1answer
40 views
how to use syslog to avoid log file being garbled when multiple proceses are trying to write to the same log fille?
I wanted to know usage of syslog when multple processes are trying to write to the same log file like
for i in $var
do
some process >> logfile &
done
wait
0
votes
1answer
81 views
Run expect script from other shell
My target is to create the /var/tmp/add_user.bash script from /var/tmp/create_script_add_user.bash script
and run the expect script (add_user.bash) from create_script_add_user.bash script.
The ...
1
vote
1answer
65 views
How to explicitly load shell interpreter in a C program
I want to create an executable script which is not readable/writable
However since an interpreter needs to read this file it is not possible to do so directly. Therefore I wanted to know if I could ...
1
vote
2answers
76 views
How do i move a pieces of data between two words if the data has a % percent symbol at the begining?
I have a log file looking somtheing like :
SWEs-elmPCI-A-01(config)#
class AutoQoS-VoIP-RTP-Trust
^
% Invalid input detected at '^' marker.
SWEs-elmPCI-A-01(config)#
...
1
vote
3answers
58 views
How can i check for existence of color in my linux box?
I want to do something like this in my linux box:
if [[ colors exist ]];then
echo "some text in colors"
fi
my doubt is :
i am using sed to put colors in log file for some text but if the linux box ...
2
votes
1answer
38 views
How do I change the colour of all lines to red begining with a % symbol?
When I use
sed -i "s,.*%.*,$(tput setaf 1)&$(tput sgr0),g" A.log
the whole line vanishes and when I use
sed -i "s,^%.*,$(tput setaf 1)&$(tput sgr0),g" A.log
only the first character(%) ...
0
votes
1answer
56 views
How given script makes executables in /usr/local/bin/
While doing project , I found a script that is bounced over my head. Can you help me to understand this script . Please explain this script step by step.
SCRIPT
if ! [ -f /usr/local/bin/XXX -a -f ...
0
votes
2answers
64 views
perl one liner + print VALUE in the end of the line
The following perl one liner checks if $CURRENT_VERSION matches $NEW_VERSION exactly, and prints it if it does.
Example:
CURRENT_VERSION=223.3.12.4.5.3
NEW_VERSION=223.3.12.4.5.3
DATE=17.3.2013
...
2
votes
4answers
154 views
Using the not equal operator for string comparison
if [ "$PHONE_TYPE" != "NORTEL" ] || [ "$PHONE_TYPE" != "NEC" ] || [ "$PHONE_TYPE" != "CISCO" ]
then
echo "Phone type must be nortel,cisco or nec"
exit
fi
The above code did not work for me, so I ...
2
votes
1answer
70 views
perl + combine exec command with perl one liner line
I have the following short perl script rename.pl. How can I translate this script to one liner perl syntax? And how to combine the perl one liner in find command?
rename.pl
#!/usr/bin/perl
$op = ...
1
vote
1answer
75 views
How to safely put user typed password into a file?
Is there any way to put the password typed by user into a file (either in Unix or in expect).
read -s -p "enter password" input
echo $input > file
Is the above code safe?
I want to use that ...
1
vote
2answers
147 views
multiple background processes in a script
Suppose if i have a situation in which some files need to be copied and it takes long time so
i would have to go for parallel processing of the file copy.
for example it may look like this
for i in ...
1
vote
2answers
75 views
renaming a directory and its subdirs without affecting their files
I have to rename directories under the root directory with prefix "ms_PF" and then rename their subdirectories with the modified name of the main directory with an extra "_", and then copy all ...
2
votes
2answers
143 views
What's the best way to backup files via network on Linux and Solaris machines?
I wonder what the best way to backup files VIA network
I have Solaris machines with Oracle 10i with VERITAS cluster, machines are connected to EMC storage
/data/oracle directory is mounted on the ...
2
votes
1answer
174 views
error handling in expect?
I am just improving my quetion becasue i have acieved so far upto this:
set username [lindex $argv 0]
set password [lindex $argv 1]
set hostname [lindex $argv 2]
if {[llength $argv] == 0} {
...
2
votes
2answers
99 views
changing pattern by removing spaces?
file :
hi hello,new york, , ,brazil site ,brazil
january,month is feb , , ,indiana jones
task:
delete all horizontal space (spaces and tab) between any two comas (like , ,) if ...
2
votes
1answer
95 views
shell variable in awk is not being passed to all the lines but just for the very first line of input?
inputfile:is2.txt
10.39.5.41,A1,B1
10.39.5.41,A2,B2
10.39.5.41,A3,B3
10.39.5.41,A4,B4
10.39.5.41,A5,B5
10.39.5.41,A6,B6
script :
#!/bin/bash
second_column="OOOOOOO" # OOOOOOO will be added to ...
0
votes
1answer
77 views
Deleting Non-empty Directory with smbclient
How can I remove a non-empty directory with smbclient?
I have tried the following:
1) rm
Result: NT_STATUS_NO_SUCH_FILE listing [dir_path]
2) recurse;rm
Result: No Error but also nothing happens! ...
1
vote
1answer
245 views
Command/scripts to check the Reverse DNS Lookup time
I am working on a project in which one master communicates with numbers of slaves. For that it has to make connection with hosts in network. But sometimes it hangs.
I think that the reason behind is ...
2
votes
1answer
88 views
bash scripting add arguments
I have created a script which takes parameters and arguments. I want to insert the --help argument.
I already know how to parse normal arguments with -, but I don't know how to parse the -- ones.
to ...
5
votes
2answers
171 views
what is the meaning of 1 at the end of awk script
I was reading this awk script
awk -F"=" '{OFS="=";gsub(",",";",$2)}1'
I want to know what is the function of 1 at the end of it
3
votes
5answers
233 views
Remove lines based on pattern by keeping first n lines
I need to remove lines from a text file based on pattern but I need to keep the first n lines of that pattern.
Input
% 1
% 2
% 3
% 4
% 5
text1
text2
text3
output
%1
%2
text1
text2
text3
I used ...
1
vote
1answer
182 views
Identify text/ascii files in Linux/Solaris
I have a little project to build bash script that search in the OS ( Linux/Solaris ) the current IP address from files and replace them with other IP address.
The problem is that IP address could be ...
0
votes
2answers
81 views
file command + how to view all results from file command
I use the file command in order to verify if file (PATH) is text/ascii file or encrypted file
Because file command have allot of results ( small example in example 1 )
I want to get the all ...
0
votes
1answer
377 views
Linux + replace STRING/WORD in file according to rule
My target is to replace any word/string/Any characters in file
with new word/string according to the following rules:
If numeric characters on the left side of word/string then we not replace the ...
0
votes
1answer
225 views
linux + perl + replace any WORD in file with special characters with condition
Example1 work fine when I want to replace OLD_TEXT with NEW_TEXT ( its replace also all special characters as $@^%)(_+`:; etc ..)
example1
export OLD_TEXT='$$OLD_WORD$$'
export ...
0
votes
1answer
87 views
linux/solaris + manipulation of Standard Output
I run the following line on linux/solaris machine ( all output will write in to /tmp/Log from application.bin )
./application.bin 1>>/tmp/Log
We can see the content of the /tmp/Log file
...
2
votes
4answers
225 views
How can I assign an initial/default password to a user in Linux?
I found a guide that explains how to set a user's password. I'm trying to automate it and send an e-mail to the user like:
userid created with password XYZ.
request to change the initial password.
...
1
vote
1answer
164 views
connect to a remote server through ssh [duplicate]
Possible Duplicate:
How do I execute a remote shell script over SSH and be prompted for passwords by commands that require it in that script?
I want to connect to a remote server through ...
2
votes
1answer
78 views
Difference between 3 commands which are used to execute shell script? [duplicate]
Possible Duplicate:
Different ways to execute a shell script
What are the specific differences between the commands listed below?
./<scriptname>
. <scriptname>
bash ...
1
vote
1answer
126 views
Linux + Solaris how to verify the last execute process from list of process
I need advice:
How to verify which is the last scan_sys.sh process that run in my linux or solaris ?
my target is to kill all scan_sys.sh process , except the latest scan_sys.sh ( the last execute ...
1
vote
3answers
195 views
Remove Linux shell script stuck
This script should remove the contents of the dustbin directory.
If the -a option is used the script should remove all files from the dustbin.
Otherwise, the script should display the filenames in ...
1
vote
2answers
222 views
Concatenate multiple files under subdirectories
My directory structure is given below
x:\Project_2012-158A\Sample_4041
SampleSheet.csv
4041_CGTACG_L002_R1_001.fastq
4041_CGTACG_L002_R2_001.fastq
4041_CGTACG_L006_R2_001.fastq
...
0
votes
2answers
158 views
Is a shell script is a programming Language [closed]
This is the first question in UNIX:
I was started shell script from 2 days before.
But I have a conflict: is a shell script a special programming language for a specific shell??
2
votes
1answer
704 views
Executing a script from Nagios event handler fails to run
I have Nagios running on a webserver. For this one Nagios service check in particular, if it fails, it will run a script. This script is triggered via Nagios event handlers.
Nagios event handler ...
3
votes
1answer
467 views
show the year while listing files in the current directory
I am working on a red hat server
I want to list the files in a way where the year when each was file created would appear in the Date
how is that possible ?
0
votes
2answers
1k views
linux + add 10 days to date and get new virtual date
I have Linux ( RH 5.3) machine
I need to add/calculate 10 days plus date so then I will get new date (expiration date))
for example
# date
Sun Sep 11 07:59:16 IST 2012
So I need to get
...
3
votes
3answers
218 views
How to remove a trailing CRLF from a file?
I have a binary file with a trailing CRLF (2 bytes total) that I want to remove. How should I do it?
Please note that I'm using busybox and I don't have perl.
4
votes
1answer
73 views
Transform directory structure
I have the following folder structure
root folder
|-al2
|- GER.zip
|- ENG.zip
|-ww
|- GER.zip
|- ENG.zip
and so on. The folder names are random strings.
I want to sort the files in ...
2
votes
3answers
2k views
Automating textual input from a bash script without using EOF
I'm running Ubuntu Linux. Suppose there is a program called myprogram. This program prompts the user for input; specifically, the user must type an integer when prompted and press Enter. I would ...
5
votes
2answers
542 views
How to tweet using terminal?
I would like to tweet a message using terminal.
I tried something like:
curl -u 'TwitterUsername':'TwitterPassword' -d status=”Your Message Here” https://twitter.com/statuses/update.xml
but seems ...
1
vote
2answers
982 views
How can I trim the carriage return from text that is being piped in bash?
I'm using this command to get my last typed command:
history | cut -c 8- | tail -n 2 | head -n 1
It works very well in bash, removing the line numbers, but there is one problem I have with it, (er, ...
