I want to print the decimal value of 1010 in gdb, but it prints the result as it is what I gave last. Answer GDB’s p[rint] command prints the value of the expression you provide, which is interpreted in the source language of the program being debugged. In C, your 1010 is a decimal literal, not a binary…
Tag: linux
Compare columns from two files and print not match
I want to compare the first 4 columns of file1 and file2. I want to print all lines from file1 + the lines from file2 that are not in file1. I don’t understand how to print things that don’t match. Answer You can do it with an awk script like this: script.awk And run it like this: awk -f script.aw…
Unix shell script to search for error codes in thousand files then print the count in text file
I need to find both 150+ eventType and errorCodes in 1700 files each day. That means i have to loop over 1700 files to find the occurrence count of 150+ eventType/errorCode and put those counts in a text file as a daily report. I have placed those eventType/errorCode values in a text file separated by commas:…
Subprocess doesn’t respect arguments when using multiprocessing
The main objective here is to create a daemon-spawning function. The daemons need to run arbitrary programs (i.e. use subprocess). What I have so far in my daemonizer.py module is: When trying to run this in bash (This will create a file called test.log in your current directory.): It correctly spawns a daemo…
move single string up into previous row
I have been trying to solve a problem for hours and haven’t found a solution. I am trying to reformat a text file that has been incorrectly parsed. The file format contains a list of names, starting with the last name first, and has a troublesome sole first name on one of the rows as below: I have tried…
Extract text with any command in linux shell
How do I extract the text from the following text and store it to the variables: Here, I want to store 05 in one variable, 21 in another, 09 in another and so on. All the value must me stored in array or in separate varibles. I have tried: I need a more clear solution or short solution. Answer Your
error while running SOLR application
i am newbie on SOLR, i want to start my SOLR via terminal ubuntu but it always give error message : tail: cannot open ‘/var/solr/logs/solr.log’ for reading: No such file or directory i try to use this script service solr start and ./solr start but the result still same, any idea to fix this problem? Answer I …
How can i get second variable in gnu make targets
Currently i have this I want to do something like Is it possible to fo like that Answer You can only have one wildcard per pattern, but you can further process the pattern to extract the information you want. For your example above, this would work:
Socket connection in Linux
I just got a error from connect API in linux. I knew ‘connect’ will return zero if connection is successful, I got return value “3” is it error code? or is there something else what don’t know? I got value 3 from sock. Answer To get the return value of connect(), it is most strai…
Where are inodes stored at?
I recently started learning about the Linux kernel and I just learned about inodes, which are data-structures containing meta-data of a file. Now, how do the OS find the associated inode of a file? (Let’s say a string of a path). Moreover, where are those inode stored at? I mean, obviously they are stor…