I have a command like echo "abcd0001gfh.DAT" | sed 's/^[^0-9]*\(....\).*$/\1/' | awk '{ print "00"$0 }' This will give me an output of 000001. But I want to run this in a loop where I receive the file name from 0001-9999 and again it becomes 0001. So my output should like below abcd0001gfh.DAT 000001 abcd0002gfh.DAT 000002 . . . a...
I'm trying to download images (.jpg) from web folder using wget. I want to download only images, which have a certain sentences in file name. This works fine wget -r -nd -A .jpg http://www.examplewebsite.com/folder/ but I like to include a sentence eg. "john". I tried wget -r -nd -A .jpg '*john*' http://www.examplewebsite.com/folde...
I am not able to find this particular discussion in SO. What are all the common mistakes and pitfalls in the BASH programming / shell scripting? PS: Please close if this has been discussed already. ...
I am trying to parse a CSV containing potentially 100k+ lines. Here is the criteria I have: The index of the identifier The identifier value I would like to retrieve all lines in the CSV that have the given value in the given index (delimited by commas). Any ideas, taking in special consideration for performance? ...
Suppose I've got a list of files file1 "file 1" file2 a for...in loop breaks it up between whitespace, not newlines: for x in $( ls ); do echo $x done results: file 1 file1 file2 I want to execute a command on each file. "file" and "1" above are not actual files. How can I do that if the filenames contains things like spaces ...
I finished my short file for a homework assignment which uses IO.popen("command").readlines to grab the STDOUT of that command. However, I need to write a shell script to wrap my ruby file in. No problem, but somehow putting it in the shell script makes readlines hang. ruby script.rb foo example > example.out this works script.sh foo...
how could we compare lines in two files using a shell script. I want to compare line in one file with the line in other.diff will give me all the differences in two files at a time.i want a line in the first file to be compared with all the lines in the second file and get the common lines as the output. with the line numbers where the ...
I am writting a shell script and i want these commands to run at the same time find ./incoming/kontraktor/ -type f -name '*.html' | sort | awk 'NR % 3 == 1' | ./bin/foo.py -m 3 -b 1 | next_command >> log/foo_log.log 2>&1 find ./incoming/kontraktor/ -type f -name '*.html' | sort | awk 'NR % 3 == 2' | ./bin/foo.py -m 3 -b 2 | next_command...
Hi, i am trying the following command on the command line ps -u `id | cut -f2 -d"=" | cut -f1 -d"("` -f | grep ppLSN | awk '{print $9}' | awk '{FS="=";print $2}' | grep KLMN | wc -l the value of teh command is returned as 7. but when i am putting the same command inside a script abc_sh like below ps -u `id | cut -f2 -d"=" | cut ...
i have unix shell script which is need to be run like below test_sh XYZ=KLMN the content of the script is #!/bin/ksh echo $XYZ for using the value of XYZ i have do set -k before i run the script. is there a way where i can do this without doint set -k before running the script. or is there something that i can do in the script...
I am trying this option #!/bin/ksh echo $1 awk '{FS="=";print $2}' $1 and on the command line test_sh INSTANCE=VIJAY but awk is failing. Is there any problem here? Basically I need the value VIJAY passed on the command line. ...
I am running a shell script through a web application. This shell script looks something like `#! /bin/bash user="" pass="" db_url="" db_instance="" sqlplus -s $user/$pass@$db_url/$db_instance @ ./SqlScripts/foo.sql sqlplus -s $user/$pass@$db_url/$db_instance @ ./SqlScripts/bar.sql CLASS_PATH="./lib/*" java -classpath $CLASS_PATH pack...
I have an output: -- out1 -- out2 -- out3 I want to get the output: out1 out2 out3 I thought of using: tr '--' '' but it doesn't recognize '--' to be the first string I want to substitute. How do I solve this? ...
I'm trying to set the environment variables in shell script. The command "source .bashrc" is not executed. As long as type the last line in the terminal, everything works fine. What's wrong with my script? thx. echo "export CLASSPATH=.:$HOME/java/lib export JAVA_HOME=$HOME/java export PATH=.:$PATH:$JAVA_HOME/bin" >> .bashrc source .bash...
I want to change a number such as 1234567890 to 456-7890; is there a way to do this in Unix Shell programming? ...
In Unix shell programming the pipe operator is an extremely powerful tool. With a small set of core utilities, a systems language (like C) and a scripting language (like Python) you can construct extremely compact and powerful shell scripts, that are automatically parallelized by the operating system. Obviously this is a very powerful ...
I'm trying to write a bash command that will delete all files matching a specific pattern - in this case, it's all of the old vmware log files that have built up. I've tried this command: find . -name vmware-*.log | xargs rm However, when I run the command, it chokes up on all of the folders that have spaces in their names. Is there ...
How can I iterate through a simple range of ints using a for loop in ksh? For example, my script currently does this... for i in 1 2 3 4 5 6 7 do #stuff done ...but I'd like to extend the range way above 7. Is there a better syntax? Thanks! ...
In a Unix or GNU scripting environment (e.g. a Linux distro, Cygwin, OSX), what is the best way to determine which Git branch is currently checked out in a working directory? One use of this technique would be automatically labeling a release (like svnversion would do with Subversion). Please also see my related question: How to progra...
In a Unix or GNU scripting environment (e.g. a Linux distro, Cygwin, OSX), what is the best way to determine whether the current checkout is a Git tag. If it is a tag, how can I determine the tag name? One use of this technique would be automatically labeling a release (like svnversion would do with Subversion). See my related question...