Im trying to use Jsch to execute a .csh script on a remote server. I am able to execute commands like cp, mv and ls. But when I try to execute a script that internally references some environment variables, the script is exiting with status 1. There is an INTERNAL_ENV_VARIABLE referenced inside script.sh that…
dh: unable to load addon autoreconf in Ubuntu 14.04
I am working with Openvswitch to create mpls vpn network on mininet platform. I am using Ubuntu 14.04 server with kernel version: 4.4.0-97-generic. I am trying to upgrade my openvswitch from 2.0.0 version to version 2.5.2 which is supported by kernel version 4.4.0 . I am following the steps for openvswitch up…
Printf tab character as hex
In a restricted shell i have only access to execute printf (no awk, hexdump, xxd, …), so i used this script to print a file as hex: issue: last line (printf %02x ‘${a:$i:1}) does not work for some character like s,r,n,t,… i handle space character with (printf “%X” ‘ ‘…
LINUX: How to softlink specific files in all subdirectories
I want to create soft links (ln -s) to folder2 of all the files that contain *foo* in its name, and can be found in some or all the subdirectories of folder1. I’ve tried it with for, find, and find -exec ln, and a combination of them, but all I get is a broken link named *foo* or a link
RDMA – how does the ibv_post_send know the CQ?
I’m trying to learn RDMA. My question is, when doing ibv_post_send, I should get a completion event on a completion queue. But how does the ibv_post_send know to which completion queue? From what I see here, I could have created many. Answer Turns out when initiating a QP, it can be assigned to a send C…
Simulate permissions for non-login user
I want to perform some actions on behalf of some non-login users, such as e.g. www-data or uwsgi. My purpose is to test some permissions, check what dirs they can modify etc etc. Is there a recommended way of going about this, other than creating a shell and password for them and su ? edit: When I try to su
Ending a Loop with EOF (without enter)
i am currently trying to end a while loop with something like this: } When i press CTRL+D on my Ubuntu, it ends the loop immediately. But on Windows i have to press CTRL+Z and then press ENTER to close the loop. Can i get rid of the ENTER on Windows? Answer The getchar behavior For linux the EOF char
Curl/sed command not processing inputs correctly
I’m having some trouble with getting this to do what I want it to do. So basically what I want is to use curl to get a .txt file from a url, then sort through it to find the word specified by the user input. Then mark all those words with a * and put them in a file specified
Does AWS Public IP addresses get issued per Network interface or per EC2 instance? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
Editing single value in file in C efficiently
I have a C program that currently edits a single value in a parameter file by using sed through a system call. I’d like to change the program to use the C file libraries to edit this value, but the only way I know how to do this is by reading in the entire file, changing the value, and rewriting