A shell script is a script written for the shell, or command line interpreter, of an operating system.
3
votes
2answers
50 views
Are there any standards/documents which tell me how to produce such nice help messages?
This is a follow up to a previous question, where Silverrocker suggested a nice way to display a help message similar to commands like ls or du.
program --help
Usage: program ...
6
votes
3answers
305 views
getopt, getopts or manual parsing - what to use when I want to support both short and long options?
Currently I'm writing a Bash script which has the following requirements:
it should run on a wide variety of Unix/Linux platforms
it should support both short and (GNU) long options
I know that ...
1
vote
2answers
117 views
How to “grab” matching files from a lookup file in bash?
I have a lookup file containing filenames. I also have a directory containing files, some of which have the names that correspond to some of the names in the directory.
How can I:
Move exact ...
0
votes
1answer
93 views
Is expect tool availabe for ARM platform
I need to get expect (tool for automating interactive applications) for the ARM platform. Is it a readily cross compiled to ARM and is it available? I tried googling but was unable to get the ...
1
vote
2answers
222 views
Total amount of memory usage by a single process say httpd
I want to get a full added amount of memory usage for a particular process. Here say I want to have the total amount of memory taken by httpd. So if I do a tail command as "tail -M"
I get
PID ...
5
votes
1answer
197 views
In the usage string of my custom shell script, shall I also display --help and --version?
I'm currently developing a shell script, called up, which shows a usage string on the commandline when called with --help. The output looks like this:
$ up --help
usage: up [-n ...
2
votes
1answer
220 views
Help me parse this `find` command
Following command tells me the length of mp4 video files:
find -type f -name "*.mp4" -print0 | \
xargs -0 mplayer -vo dummy -ao dummy -identify 2>/dev/null | \
perl -nle ...
1
vote
2answers
1k views
Help understanding cut command in script
In a bash script, there are the following 2 lines:
ipaddr=$0
segments=`echo $ipaddr | cut --delimiter=. --fields=2-3 --output-delimiter=/`
I do not know how to interpret the second line where the ...
1
vote
2answers
157 views
explain the command `printf — “#!${opt_E}”`
I am not able to understand this command and getting confused :
here are things i executed on linux trying to undertand its working
[root@testgfs2 final_scripts]# printf -- "#!${opt_E}"
printf -- ...
3
votes
2answers
1k views
Executing a shell script from remote server on local machine
Imagine a shell script on the remote server as
#!/bin/bash
rm /test.x
How can I (if possible) to execute this script from my local machine to delete /test.x file on my local machine. Obviously, the ...
0
votes
1answer
89 views
How to delete number of lines from file repetitively
I've read How do I delete the first n lines of an ascii file using shell commands?, it is helpful. However I've a file something as below (please consider 2 columns as 2 different files):
1 4
1 4
1 4
...
3
votes
1answer
160 views
Pausing rsync via bash script?
Is there a way to pause rsync via command line, if it transfers data for over X minutes? I'm working on using it as a backup and would like it to pause every once in a while to prevent the hard disks ...
3
votes
5answers
250 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 ...
0
votes
1answer
83 views
How do I write a script to keep retrying Yum Update Program?
My job let me always release a new version of the program to a satellite server, then in the running server, I use yum update program to update the program.
However, due to unknown reason, in most of ...
2
votes
2answers
509 views
how to move (not copy) files from one server to another?
I want to move files from server1 to server2.
A producer on server1 will keep generating the files, and a consumer on server2 will keep processing them.
I can copy files using the following shell ...
3
votes
2answers
91 views
Make copies of a single directory to multiple directories with different names
I'm trying to replicate a single directory (with sub-directories) to a bunch of new directories based on a list. For example I can:
mkdir Fred Barney Thelma Louise Foo Bar
How would I copy a premade ...
-5
votes
1answer
69 views
Counting the number of files with in a diectory with a pattern but pattern dosen't know [closed]
To count the files in a directory having some pattern for some files, but we don't know the pattern, then How to count than particular pattern files?
For Example
If a directory has xx_1.txt, ...
0
votes
1answer
255 views
Shell script to delete all files which are older [duplicate]
Possible Duplicate:
Deleting files by age
Write a shell script to delete all the files which are "n" of older that current day, where n can be 3days. 2days, or 1 year etc. The above script ...
3
votes
1answer
151 views
Need to improve urlencode function
I need a way to URL encode strings with a shell script on a OpenWRT device running old version of busybox.
Right now I ended up with the following code:
urlencode() {
echo "$@" | awk -v ORS="" '{ ...
1
vote
1answer
187 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 ...
2
votes
2answers
486 views
Concatenate multiple files with same header
I have multiple files with the same header and different vectors below that. I need to concatenate all of them but I want only the header of first file to be concatenated and I don't want other ...
0
votes
2answers
83 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 ...
3
votes
3answers
145 views
Zsh function with su and echo
I'm trying to add a function to my .zshrc that makes adding new USE flags to my /etc/portage/package.use file easier. Normally, I'd have to do
su -c 'echo "net-misc/aria2 bash-completion bittorrent" ...
1
vote
1answer
111 views
Environment auto-install script
When I work, I often have to switch computers or virtual machines which means that every time I switch, I have to set up my (Linux) environment again.
Is there a tool (in contrast to a simple bash ...
1
vote
2answers
186 views
Convert discus output into readable HTML mail
How can I take the DISCUS command output below:
and convert it into something HTML email friendly? I've bash scripted something like this:
#!/bin/sh
discus > /tmp/discus.log
touch ...
1
vote
4answers
341 views
gpg asks for password even with --passphrase
I expect the following command to extract the gpg file without asking for password:
gpg --passphrase 1234 file.gpg
But it asks for the password. Why?
This also have the same behavior:
gpg ...
1
vote
3answers
260 views
linux/solaris + verify duplicate valid IP address from file
what the best way to find duplicate IP from file ( I have ksh script in this script I need to write function that check for duplicate IP )
for example if IP - 192.1926.23.52 exists twice in file - ...
0
votes
4answers
733 views
/shell-script: syntax error near unexpected token `done'
I am getting syntax error near unexpected token done while executing my shell script:
while read filename
do
echo "$filename"
if [ -s $filename ]; then
tail -10 $filename | grep `date ...
3
votes
2answers
623 views
sed: multi-line replace of config block
I have some configuration files that basically look like
(...content...)
# BEGIN DYNAMIC BLOCK - DO NOT EDIT MANUALLY
(... more content ...)
# END DYNAMIC BLOCK
(... even more content ...)
Now, in ...
0
votes
3answers
171 views
How to match a file name suffix
How to verify if the name of a .xml file name ended with .any-string? e.g. .previous or .backup or bck12 etc ...
I need to print the XML file name except for XML files that end with ...
3
votes
1answer
183 views
Color script output only when invoked from interactive shell
I made a bash script producing colored output. The colors are fine when the script is called from an interactive shell. However, if the output is processed in another script, or passed through a pipe, ...
5
votes
4answers
249 views
Tool to create text files from a template
I have to regularly create 100+ text files from templates.
I currently use an overly complicated shell script. I think there is a smarter way to handle this, but I don't know how.
I have a "database" ...
3
votes
1answer
340 views
Capture screen content for error parsing
I am a database administrator working with DB2 on AIX. (Please continue to read as this is related more to ksh than DB2, otherwise I would have posted this over on dba.stackexchange.com.) I am ...
3
votes
2answers
189 views
Error when subtracting two negative numbers in ksh: “assignment requires lvalue”
I am trying to debug someone else's script:
The code line is:
y=$((${oldvalue[$x]}-${newvalue[$x]}))
y gets calculated fine as long as both sides are positive numbers. However, I have a ...
5
votes
2answers
439 views
How to continuously take backup of log files?
I have some applications in Lunux which creates Log files of around 41 MB each. The log files switches from log.1 to log.2 and starts overwriting log.2 once this 41MB is completed in log.1 file.
I ...
3
votes
4answers
336 views
bash string extraction
I would like to extract the 2nd field from the last part of the following strings:
foo_1.103.debug_xx.ver21-inc-1 --> string extracted "debug_xx"
foo_1.103.1.0.release_32_xx.ver21-inc-1 ...
2
votes
1answer
370 views
Bash variable in Awk script
I have this flat file database(ff_servers.db) with following contents:
192.168.154.2 Alaska hp
192.168.157.3 Colorado dell
192.168.156.3 hawaii hp
From command line, I could run:
awk ...
3
votes
2answers
174 views
Shell script debugging
I was wondering if there is an IDE that would allow me to define an ssh connection to a remote host, connect, and locally debug a script running remotely (kind of like you can debug a remote Java app ...
2
votes
1answer
56 views
Listing script's file dependencies
Given a shell script, is there an easy way to extract what files it manipulates explicitly (so not like concatenating some command and than eval-ing it)? E.g.
#!/bin/bash
. /etc/someconfig.cfg
...
4
votes
1answer
141 views
what is the zsh equivalent of bash's export -f
So I started using zsh. I like it all right. It seems very cool and slick, and the fact that the current working directory and actual command line are on different lines is nice, but at the same time, ...
3
votes
3answers
524 views
Preserve directory structure when moving files using find
I have created the following script that move old days files as defined from source directory to destination directory. It is working perfectly.
#!/bin/bash
echo "Enter Your Source Directory"
read ...
2
votes
2answers
96 views
Does a parent bash script remember the cd history from a child bash script?
Example:
mainscript.sh
cd /mnt/something
./buildscripts/000-script.sh
000-script.sh
cd /mnt/otherthing
mkdir something
exit
-1
votes
1answer
103 views
Error while running bash script that moves files
I am new to bash script and want to create bash script that moves some days old files between source and destination as per days defined in script.
When I run this script I get error
find: paths ...
0
votes
1answer
61 views
Why is this variable not getting passed to awk? [duplicate]
Possible Duplicate:
external variable in awk
How do I pass this variable below?
This doesn't work:
fname=testfile.txt
lsof | awk '/deleted/&&/$fname/ {print $4}' *----no output*
...
0
votes
2answers
130 views
Shell script that copies while adding a user-provided filename suffix
I'm trying to write a shell script on Solaris that copies files from one directory to another. I need it to prompt the user for a date, and add that as a suffix to the destination filenames. How do I ...
2
votes
1answer
60 views
How to set Cols and Lines for a Subprocess
I have a script that runs a series of scripts numbered 001,002,003,004... etc down to 041 right now, will be more in the future - and these scripts them selves use some cursor control to print a ...
3
votes
3answers
114 views
SSH to two addresses, use the one that connects first
I have a home computer (let’s call it franklin because that’s what I call it) that I often ssh into from my work laptop. When I’m at home, I ssh to franklin.local, and when I’m at work or anywhere ...
0
votes
1answer
159 views
difficalty to save traceroute output in shell variable?
I need to filter and store traceroute output in shell variable (array). But I am getting some unusual output.
As I try to explain in following lines.
My present directory is temp, having some ...
2
votes
2answers
270 views
print a file in hex using awk
I have a file name x
$ cat x
1A34532112345
I wants to print in hex using awk I written a script (with help from web)
fold -1 /home/cscape/Desktop/x | gawk '{ printf("%s , %X\n",$0, int($0) )}'
...
2
votes
3answers
149 views
Indent like first line
How can I indent a file such as its first line?
Example:
A file containing
x=1+2+3+4+
5+6+7+8
+9+10+12
should be converted to
x=1+2+3+4+
5+6+7+8
+9+10+12
I need this inside ...
