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Tag: linux

Bash script to execute commands on system boot up

I am trying to make a bash script to check for two data values and weather or not they are set to 1 or 0 I want to do something. These values usually are set on system bootup and are defined usually after system is completely up (that is why I am using a while loop to keep checking until

grep first n rows, return file name only

I can do the following to search for what I need and return the file name: grep -l “mysearchstring” ./*.xml However the files I am searching are huge so this takes forever. The string I am searching will appear in the first 200 rows so how can I search only the first 200 rows and still return the …

Javacpp: liblept.4.dylib library not loaded

On my 64 bit Mac OSX Trying to use a native C++ library from a java project just as described in this link: https://github.com/bytedeco/javacpp-presets/tree/master/tesseract But I get this error when I run the example, library liblept.4.dylib is not loaded, and I have no idea what to do. UPDATE: I tried to in…

Use Xargs to wait for enter key

So, I have a list of files that I want to use to generate a new set of groups of files. I want to open up these groups (multiple files) together at once. Edit them. Then go back to the terminal, hit enter, and open up the next group of files. I’ve got it working, but I’m using a temporary

Using linux sort on multiple files

Is there a way I can run the following command with Linux for many files at once? Answer I assume you have many input files, and you want to create a sorted version of each of them. I would do this using something like Now, this has the small problem that if you run it again, if will not only

How to trap memory reads and writes using sigsegv?

How do I trick linux into thinking a memory read/write was successful? I am writing a C++ library such that all reads/writes are redirected and handled transparently to the end user. Anytime a variable is written or read from, the library will need to catch that request and shoot it off to a hardware simulati…

Converting values from for loop to json format

Below is a snippet of a for loop where I sort txt file names. I am then trying to save the results in a json format file. However it results in an invalid json format due to the last , inserted in obj. How could i convert to json format the values from the for loop? script Desired output Current

Squid routing SSL traffic

Good day, I have a setup in which I am routing my received packets at my Mikrotik router to a squid server. I also can see the incoming traffic with Tcpdump that it is actually ariving @ the correct port (443) on Squid Proxy server. On the next step I have iptables -t nat -A PREROUTING -p tcp –dport 443