everyone! I’d like to remove duplicates and keep lines with the highest value from one column (4th column) in a file with 4 fields. I must do this in a Linux server. Before After Thank you so much and I’m sorry if I asked something repeated! But I didn’t find an answer for my problem. Answer…
psql: could not connect to server: No such file or directory “Centos7”
Not able to access psql database. Below is the error while accessing database: I also tried to look for postmaster.pid but didn’t find it Answer Your server is down or at least not where your psql command thinks it is. You can search your system for postgres.conf which should tell you what port it’…
XenServer 7.2 parted mkpart error
I am attempting to partition my Dell R710 for VM storage. Details: Newly installed XenServer 7.2. Accepted Defaults. 5x 2TB Drives, Raid 5. Single Virtual Disk. Total storage: 8TB All I want to do is add two partitions, a 4TB for VM storage, then whatever is left for media storage (~ 3.9TB). When I run parted…
string to long, not giving me the correct answer
I am trying to convert number stored in the c string to long int. But I am not getting the expected output: Output : 821493369 gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) Can you please advise what am I doing wrong here? Thanks. Answer In addition to using long long, you can use exact width types from stdin…
OSGi declarative service is active, but bind() is not called
I’m facing an issue in OSGi context with declarative services which I don’t understand. I try to explain: I have a FooService which needs the FooManagerService (1..1 static). The FooManagerService references the FooService, but it’s optional (0..n dynamic). The goal is, if a FooService becom…
I want to automate my angular build using pos-receive in background process
I want to automate my angular build using pos-receive and i want it to run in backgound process so I will not wait to finish the command. I tried the following the following code on my post-receive but it doesn’t work. post-receive I also tried to create a separate executable script on usr/local/bin dir…
Running a program on many different computers automatically
I am new to scientific computing and am working on a project which involves running many simulations. The infrastructure with which I am provided for this is about 20 different linux machines which all share storage. What I’ve been doing so far is the horrendously inefficient task of ssh’ing into …
Dumpout Process Memory Layout During Loading Time
I am working on a project where I need to use LD_PRELOAD to load some libraries into the memory space. It’s like: Due to certain reasons (I am actually working on some binary hacking), I must know the memory address (not a symbol) of certain functions (let’s say, foo) in libapp.so and instrument t…
Shellscript If statement returns error
I am trying to check if a file is older than 5 minutes and if that is the case I want to call another shell script which sends me a mail. check_file.sh: Error output: 3: ./check_file.sh: [1]: not found Answer Try something like:
pthread_kill() not sending signal to main thread (main program)
signal can be received in any threads or main program itself. i have created one auxiliary thread from main program. so there is two thread in my program 1. main thread (process itself) 2. Auxiliary Thread. I just want that whenever signal arrived in my auxiliary thread, that should send signal to my main thr…