I am getting a stream of numbers in a pipe, and would like to perform some operations before passing them on to the next section, but I'm a little lost about how I would go about it without breaking the pipe. for example > echo "1 2 3 4 5" | some command | cat 1 4 9 16 25 > Would you have any ideas on how to make something like this...
How do I print a line which matches a particular pattern and the line before it? I do have a dump like this: Apple:Orange=9942501133; Fault Code 9 Apple:Orange=9942501144; Fault Code 9 Apple:Orange=9942501155; Apple:Orange=9942501166; Apple:Orange=9942501177; Fault Code 9 Apple:Orange=9942501188; Apple:Orange=9942501199; Apple:Orange=9...
I have a sample file containg "aA0_- " characters on each one on a single. Sorting it using GNU sort gives the following sort order: $ cat /tmp/sample | sort _ - 0 a A after appending some other character, we obtain a different order (non-alphanumeric characters seems to have lower priority): $ cat /tmp/sample | sed 's/$/x/' | sort ...
How do I print a line which matches a particular pattern and the line before it? I do have a dump like this: Apple:Orange=9942501133; Fault Code 9 Apple:Orange=9942501144; Fault Code 9 Apple:Orange=9942501155; Apple:Orange=9942501166; Apple:Orange=9942501177; Fault Code 9 Apple:Orange=9942501188; Apple:Orange=9942501199; Apple:Orange=9...
I deleted symbolic link which was pointing to x binary, recreated a same link pointing to y binary i.e. now it’s pointing to y binary instead of x binary. When I am running binary from its location it’s giving correct result. Let say the binary is at location $/tmp/value>./y Output is correct If I go to another directory, /abd/def>...
Ok, I know that System.getProperty("os.name") will give me the name of the OS I'm running under, but that's not a lot of help. What I need to know is if the OS I'm running on is a 'Unix-like' OS, I don't care if it's HP-UX, AIX, Mac OS X or whatever. From the list of possible os.name values it seems like a quick and dirty way of detecti...
Hi, I'm new to UNIX, having only started it at work today, but experienced with Java, and have the following code: #/bin/bash echo "Please enter a word:" read word grep -i $word $1 | cut -d',' -f1,2 | tr "," "-"> output This works fine, but what I now need to do is to check when word is read, that it contains nothing but letters and ...
I am looking for a unix command to get a single line by passing line number to a big file (with around 5 million records). For example to get 10th line, I want to do something like command file-name 10 Is there any such command available? We can do this by looping through each record but that will be time consuming process. ...
I am hosting a Java web service on a AIX unix box using JBoss. Some of the web methods browse the unix file structure (IE GetDirectoryFiles returns all files for the directory path passed in). I want to integrate this with the unix security so that the caller would pass in a username/password at the session level and they would be limi...
What I have: the login/password for a UNIX user (alice). Who I am: some other UNIX user (bob). What I need to do: start a process programmatically (foo) as the other user (alice). What the end result should be: the process is running and displays alice as the owner if a "ps" is done. For purposes of privileges, acts as if alice starte...
I've a file with 2 lines having key, value pair on each line. "//" is used as comment style. 1. key = "string_key_value" //string key How can I extract string_key_value without quotes? 2. key =100 //integer value How can I extract 100 from here as an integer? I've to re-use these values in another unix command. ...
Basically, I want memcached that can store over 1MB. ...
Hi i am using R on windows XP i have cygwin on my shell path what i want to do is send a command to gawk via R shell command this way: shell("gawk "{print $1}"", m[1],"_", h[i]."_79.7.dat""} i get this error Error: unexpected '{' in "shell("gawk "{" how can i fix this problem? Thank you ...
I remember vaguely a technique using pipes for communication between two shell processes. Are there any tutorials available on how to setup and control a subshell? ...
I have file like this.. for eg: number,dac,amountdac,expdate,0 1111,1,0.000000,2010-07-21,0 1111,2,0.000000,2010-07-21,0 1111,3,0.000000,2010-07-21,0 1111,4,0.000000,2010-07-21,0 1111,5,0.000000,2010-07-21,0 1111,6,0.000000,2010-07-21,0 1111,7,0.000000,2010-07-21,0 1111,8,0.000000,2010-07-21,0 1111,9,0.000000,2010-07-21,0 1111,10,0.0000...
I'm having a problem with my server at work, it's not letting me access any files via FTP that were uploaded or created by PHP, like log files and user uploads. I CAN access them via HTTP. Server - Apache/1.3.41 (Unix) This is a big problem for me, and I feel like it must be some server configuration because this doesn't happen elsewhe...
i am using the below code for replacing a string inside a shell script. echo $LINE|sed -e 's/12345678/"$replace"/g' but its getting replaced with $replace instead of the value of that variable. could anybody tell what went wrong. ...
i tried the awk liner below(on windows command-prompt):not working properly gawk -v var="hot" "{ if(!NR){gsub(/cool/,var,$0) ;print} else{print}}" awk_test input file is below this is a cool jack this nota cool kack this obviously a cool jack a unix solution is also feasible ...
Unix System programming to be precise. ...
PLEASE don't tell me why you think its a bad idea. Just tell me if its a workable idea. I want to create files in a folder with names like the following: [email protected] [email protected] [email protected] Is there some fundamental incompatibility in the characters allowed in email addresses and those allowed by a unix syst...