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Tag: linux
Can’t run same tcl code through tcl script?
I can run the same code by going to tclshfrom my Konsole but when i try to run it using a tcl script, it gives no output. I have a file named name which contains this my name is dev my name is vaibhav When i run the command through tclsh , it gives the required output. Command is exec
How costly is a low contention mutex in terms of cpu
I have some C code (on Linux) that needs to run in a thread safe manner. It’s very low contention but I have to guard it to ensure correctness. I have the option of using local variables to guard it (which will work based on how the code is written) but since I have a mutex variable, which is the
Run script when a command is executed irrespective of the command’s arguments
When any of these commands are run I want them to run a certain script. Something like alias ?=’some_script.sh’ (the question mark in this case means the rm command with any arguments.) How can this be done? I don’t HAVE to use aliases, anything that works is fine. Answer Don’t use an …
BASH syntax error at line 1: `then’ unmatched
Hi, I am having issues with this particular loop and couldn’t find a solution to it, any ideas why? Answer If you run the code through shellcheck and correct the errors which it shows (except for one problematic warning), the code will become: The code still seems to have issues, one of which is that it…
Apache Tika – PrintWriter works on local Windows machine but not Linux box
I’m stumped. This script works great in Eclipse on my windows machine, if I hard code the file paths. If I try to take in arguments and run it on my edge node (a linux box), it throws no particular errors but it just leaves an empty output file. I must be missing something stupid, but I am not seeing
Pass argument to awk inside do loop
I have a large number of tab-separated text files containing a score I’m interested in in the second column: test_score_1.txt test_score_2.txt I want to check if I have Titles with a score smaller than a number I define. The following code defines my score in the script and works: check_score_1 If I try…
Bash sort ignore first 5 lines
I’m having trouble ignoring the first 5 lines of my file while sorting the rest. My current command sorts the entire file by the second item, however I need to skip the first 5 “header” lines. I need read it and write it to the same file. Current Command Example Answer This sorts lines 6 and…
Wrapping stdin/stdout causes IPython to lose auto completion and history features
I’m working on a script that uses the embedded shelling capabilities of IPython and as a requirement, it has to log all the data from stdin/stdout into a file. For this reason I decided to write wrappers for them; however, after switching out the streams my embedded IPython shell loses its auto completi…
Python – Crontab script not showing Pillow Images
My crontab is In new.sh I have In new.py I open images with the Pillow module and play music, but when I boot it only plays the music. Any help is appreciated. EDIT: The music plays perfectly. Edit: The shell script runs it fine in terminal. ANSWERED! Answer In the bash script, write export DISPLAY=”:0.…