Questions tagged [unix]
Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs.
1,963 questions
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Setting up IBM HTTP server audit_log rotate
I found somewhere online that you can set up log rotation for audit_log on httpserver so in my modsecurity.conf i switched logging conf from:
SecAuditLog logs/audit_log
to
SecAuditLog "|/usr/IBM/...
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Convertingt top custom command for memory usage by processes to AIX
I wrote a custom shell command using the top command, in order of getting the sum memory usage for all the processes of a given program (for example java*, mongodb*, etc..) in a Linux based servers:
...
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How to delete non root-owned files from Unix /tmp folder
We have some Ubuntu v22 servers that get a lot of files dumped into the /tmp directory, in spite of our best code efforts to clean up after the processes are done. What we would like to do is run a ...
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340
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How to Dynamically Adjust Rate Limits Based on Concurrent Connections in Nginx?
I am currently facing a challenge with dynamically adjusting rate limits in my Nginx configuration based on the number of concurrent connections to my web server.
Problem Statement:
I have set up a ...
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75
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Is my dedicated server HD dying?
I have a dedicated server with 2 3TB SATA HDs. I use the server to create and share torrents. Recently I got the following error message when trying to create a torrent based on files on that server.
...
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what should unix dev_weight value be set to?
This past week, I was looking for a way to boost server performance despite it having multiple CPUs at 3.3Ghz each.
So I thought, let's increase dev_weight to 512 because documentation states the ...
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133
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Linux ACL of a shared folder for specific group
I need to make a shared folder: I have separated my work between several users on the same computer and need them to access the same folder without restriction. They all belong to a "work" ...
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1k
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Kubernetes- execution phase preflight: couldn't validate the identity of the API Server
I am trying to create a bare metal Kubernetes cluster of one master node and three worker nodes. The nodes are Ubuntu VMs running in a VMWare Workstation lab environment. The master node is ...
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206
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FreeBSD user has no permission on .ssh directory
I have a problem on FreeBSD 14.0 - the ~/.ssh/ directory is owned by me, but I can not access it as myself:
$ ls -al .ssh
ls: .: Permission denied
ls: ..: Permission denied
ls: authorized_keys: ...
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argument to pgrep from cmdline returns 2 PID's and argument from global variable value returns 1 PID
1.first case(processName as argument from cmd i.e java)
command from cmd with arguments : ./a.sh getProcessId contains java
code:
getProcessId(){
matchType=$1
#defaulting matchArg to x i.e exact ...
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1
answer
382
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pgrep -f from shell script is returning 2 pid instead of 1
code :
function main {
[ -z "$@" ] && { getProcessId "$@" } || "$@"
}
getProcessId(){
matchType=$1
#defaulting matchArg to x i.e exact match
matchArg=x
...
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2
answers
395
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change shell to /usr/bin/false in IBM aix os
I would define the program run for the user at session initiation into /usr/bin/false in /etc/passwd. The default value parameter is /usr/bin/ksh.
When I try to modify it with commands:
bash-5.1# ...
- 111
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702
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kubectl get nodes --kubeconfig admin.kubeconfig returns "No resources found"
I am a newbie in Kubernetes. I am not even very familiar with basic kubernetes commands, but the installation is a starting point for my learning journey. I wanted to avoid installing something like ...
-2
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1
answer
67
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Is it bad that I don't update the server? [closed]
I am running an application on my server with the help of Nodejs, and it has many dependencies such as Chrome.
I have not updated my server for two years. I am afraid that if I do, my code will fail ...
- 159
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29
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Need help in logrotation
I have custom logrotation as below..
cat /etc/logrotate.d/apache
#
#
/var/log/apache/apache.log
{
daily
rotate 30
size 1G
compress
missingok
...
- 433
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389
views
nginx fowarding 20% (spaces) instead of + in url
I have an NGINX config that takes url's converts them with regular expression, this works fine. The issue is that while forwarding to the new atlassian instance the + from the URL is turned into %20 ...
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748
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is /etc/sudoers writable or not
The default permission in /etc/sudoers file is readonly for root and group root as in picture is obvious :
So when you open it with any test editor it can't be written and give error read only.
now ...
- 174
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295
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Mount a remote GPU locally on Rocky Linux
I am doing some work on a server which has 1TB RAM, 100CPUs, and 1000TB storage. My work involves very large datasets.
One specific I am trying to run would benefit immensely from a GPU, it is ML ...
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3
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1k
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How to have an environment variable with quotes in crontab?
I have a minimum example of my problem, which is trying to install a crontab that looks like this:
FOO="foo\"bar\"bin"
0 0 1 * * ls
by running crontab crontab (I have it in a ...
- 7,608
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418
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Passing a user input to an ssh command
I'm currently trying to create a shell script that will execute a mysqldump on a remote mysql database and then copy the output file back to my local machine. The problem I'm running into is that I ...
- 171
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187
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Apache 2.4 unixgroup authentication not working
Require unix-group is not working for me when configuring the VirtualHost for my Apache server. Whenever I log in using pwauth, the server still authenticates users who are not members of the group ...
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3k
views
Send STDERR to console and file, STDOUT to file only
I have some script with STDOUT and STDERR output. By default, both STDOUT and STDERR goes to console:
./script.sh
I can redirect STDOUT to file, leaving STDERR output in console:
./script.sh > log....
- 651
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166
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How to Find which Program is generating given .dat File
I have a file in a folder on the server with ".dat" extension. I want to find which program file is generating this file.
How should I find this using putty?
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105
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Linux Debian ACL, is default mask overriden by something in FTP?
I have an Linux Debain 10 server running an web project.
The project (parent) folder is as follows:
ls -la:
drwxrwxr--+ 7 some_user some_group 4096 Jul 21 11:01 .
getfacl:
# file: .
# owner: ...
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558
views
sed not working on large files. Any other options available?
Trying to insert a line feed on large files in UNIX when a text string matches. Any file around 1GB or less, it works. Anything over that size, it does not complete the replace. It appears to do ...
- 1
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204
views
Add mac address in rsyslog template
I am trying to add system/device mac address in syslog. No solution is working for me. Following command gives me mac address, just wanted to use in rsyslog template.
mac_addr=$(ifconfig en0 | awk '/...
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answers
2k
views
Can't enable the PHP DOM extension
I have a server that has PHP 7.4.3 installed, but it doesn't load PHP-DOM.
It's not listed in php -m or php -i, nor when I load PHP on a page.
Here's what I tried so far:
Ran sudo apt-get install php-...
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50
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How to protect Jenkins from super users?
Any super user who has access to the Jenkins running on a Linux server can easily disable security authentication from config.xml file; then log in and can also decrypt sensitive passwords from ...
bsd-boo
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872
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'mail' not working in Script same way it is working from command line
The below line of code/command is working as expected if I run it from Unix terminal, but not if I include it in a script and run the script - exact same.
I am expecting the X-Priority to show the ...
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2
answers
694
views
Adding users to Unix groups only if said groups exist (puppet)
I tried using the 'group' attribute of the 'user' resource like so :
user {
"user":
group => ["docker", "www-data"]
}
If the groups 'docker' and 'www-data' exist ...
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-2
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1
answer
194
views
transfer file from Unix to a writeable Windows share, if I don't have direct login rights to the latter
I'm an sa on Unix side, and there is a writeable Windows share, which I can access from my desktop using an AD service account.
How can I batch a file transfer from Unix over to that mount (it's not ...
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188
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Way to know the current shell in a given terminal
I have a shell on a Unix system.
Is there a command that can tell me which shell I am working ? (bash, zsh, etc. )
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119
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Linux analyze and monitoring log tool?
I have a server using OS centos-7, but sometimes my server got slow with some processes. I want to check which service or process makes the system slow. how to check the percentage of CPU, ram, or ...
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340
views
Failed to connect to remote MySQL server via proxy
I am trying to use an R tool in which RMySQL is one of the package being used. I am working this on ubuntu behind a corporate proxy but having the following issue for three days persistently.
Error ...
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Does information piped through a Unix socket touch disk?
I'm trying to understand how fast different IPC mechanisms are, and I know it's possible to create a Unix Socket as a "file" in a directory on a filesystem, but what I don't understand is ...
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476
views
Is there a utility for detecting temporary system freezes?
Is there a (unix) utility which is able to detect temporary system freezes by observation?
E.g. I could imagine an utility which continuously fetches the system time, sleeps for a specific amount of ...
- 203
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40
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Single SSH login for multilpe machines?
I have a number of physical (desktop) machines running at the office as part of a new network to handle processing & serving Open Source data; some of these machines also house VMs.
At the moment, ...
- 113
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298
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Geting UNIX Timestamp while logging history
I am running below bash script which is saving the history in a file, however it is logging the history with Unix epoch timestamp. I need the timestamp in human readable format.
_who_am_i=$(who am i|...
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1
answer
2k
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Why some companies like cisco follow different syslog messaging format rather than rfc 3164 (BSD syslog) and rfc 5424 (IETF syslog)?
According to my understanding the popular syslog formats are:
RFC 3124 (BSD syslog):
Format: < priority >timestamp hostname application: message
Example: <133>Feb 25 14:09:07 webserver ...
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484
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Why an operating system would like to be POSIX compliant? [closed]
What's the big deal around POSIX and how it interferes in the overall usage of an Operating System?
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533
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Nginx reverse proxy when port is already in use?
i am trying to close port with basic authentication (for pushgateway of prometheus), so not a big specialist in nginx, so could someone please give me and advice where i am is wrong?
I have 9091 port, ...
- 103
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2
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184
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Issue using dd to write 1GB file to zfs dataset on FreeBSD 13
Hey guys I am turning up a little FAMP stack on an Azure VM. 4 Xeon cores 16GB ram. Second SSD is using ZFS and the boot drive is UFS2 (Default). When I dd if=/dev/zero of=testfile bs=1024 count=...
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Replace a string from the cat output
I need to replace a string with the string which is mentioned in a file abcd.txt in all files in a folder.
For eg: I want to replace a string 'apple' with whatever the cat output of this file abcd.txt
...
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927
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Copying files from remote to local using lftp in unix
I'm trying to write a script to copy some files from a remote ftp server to a local directory. I have seen lots of examples using the mirror command of lftp but so far none of them seem to work. ...
- 171
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174
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NextCloud : Can you use encrypted drives / file level encryption?
I am evaluating NextCloud for a solution for which I have a requirement that files cannot exist on non encrypted disks or the files themselves cannot be individually read or cached.
I have read a lot ...
- 355
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549
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What is the maximum value acceptable for xargs -P argument? [duplicate]
In this answer they mention 10
I did man xargs and couldn't find what's the maximum limit.
Is it possible to send 10000 cURL requests per second?
How about 50000 cURL requests per second? I mean all ...
- 103
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366
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What was linux/unix time standard before inventing epoch? [closed]
As in the title, I was looking for, but hadn't found. How were time stored and processed before epoch standardizing in 2000?
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How to edit the middle of host name (%h) in ssh config?
In ssh config you can easily edit a hostname by appending or prepending it with something. For example, when you want to connect to server with ssh test5, but actually the server name is test5.mail, ...
- 366
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706
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change fastcgi directory in nginx configuration
i am not sure how to write the proper title
i have 5 ajax requests that gonna execute postgresql query in php
here is the directory
/var/www/webgis.com:
1. webgis.html
2. php(directory)
-query1....
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418
views
finding docker images with tag and name
when I do docker images I have below docker images as list where there are images with multiple tag and also image with latest tag value.
REPOSITORY TAG ...
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