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.
1,957
questions
3
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0
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Configuring Solaris audit to include username into his events
Need to configure audit logging in Solaris but I have a problem. There are two SunOS servers which were configured before. When I started analysing logs I found out that in Solaris 10 I can see the ...
0
votes
1
answer
286
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TC Corruption of Packets Ingress
I’m new to tc & this may be naive question but correct me if I’m wrong
tc qdisc change dev eth0 root netem corrupt 5%
Does above command corrupt ingress packets only ?
If Yes, does outgress ...
0
votes
1
answer
34
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Group of new file created by the webserver is always set to sudo
I am running a magento 2 project on Apache 2 Webserver.
There is a logfile folder at var/log
I have set the permission, user and group of the folder to drwsrwxr-x 2 company www-data by using chmod ...
2
votes
1
answer
567
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Extract a ids from text file
I have a text file live below
{
"data": {
"assigned-entity-id": null,
"assigned-entity-type": null,
"availability-domain": null,
"...
1
vote
2
answers
701
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Security: Linux - Postfix/dovecot - Roundcube - unix permissions for the mail user
Background:
I am running a working mail server with a postfix/dovecot on debian buster as in this guide. Like in the guide, I installed roundcube on the frontend.
The last chapter of the guide ...
0
votes
0
answers
278
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Add IPV6 range / block on network debian configuration
I am configuring a network interface on my server, editing this file /etc/network/interfaces.d/50-cloud-init.cfg
I need to have a list of IP address configured which all are in the same ip-block.
For ...
0
votes
0
answers
135
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When a solaris server has 2 SSHs installed, how to choose which one client is connected to
Currently my solaris server has 2 SSH installed:
/usr/bin/ssh (Sun_SSH_1.1.6)
/usr/local/bin/ssh (OpenSSH_5.1p)
When I SSH this solaris server from another, /usr/bin/ssh is responding.
I would like /...
0
votes
0
answers
354
views
IPtables rules in python using bash script
Here is my python script in bash, I am using subprocess.run to call iptables command , but I am getting an error
subprocess.run(["/usr/sbin/iptables", "-A", "INPUT", &...
0
votes
1
answer
347
views
Renaming a tar file in unix script
cd /var/opt/sw/e4/data/dev/e4_dev/DEVL3/EW/EWD1/DATA/AED/INPUT
for file in *;do tar -czf ../OUTPUT/"${file}".tar; done
According to the above code the files in input path eg. aedlog, aaalog....
0
votes
1
answer
255
views
Security implications of having less permission restrictions on a group than owner in Unix?
I have an Ubuntu server that's currently hosting a WordPress site using an Apache web server, MySQL and PHP etc. Additionally I have configured VSFTPD and SSH to handle FTPS (implicit FTPS) and SFTP ...
1
vote
1
answer
444
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Exclude subdirectory from host resolution set in /etc/hosts (with dnsmasq, or anything else)
I have a local development tool (LocalWP) that sets the path to my local environment by modifying /etc/hosts.
For example, if I set my site in Local to www.foo.com, it'll append the following to the ...
0
votes
1
answer
418
views
Rsyslog using more memory on CentOS 7
I see rsyslog is using more memory on my EC2 instance. Is there a way we can fix it?
I tried cat /proc/<pid_of_rsyslogd>/limits and tried changing the limit value but no luck.
Max stack size ...
0
votes
0
answers
157
views
AWK to read multiple files in linux without duplicates
I have a task to merge three files in linux, so i used awk to achieve this task.
hostsfiles is a variable which has test.txt test1.txt and test3.txt
awk 1 {{ hostsfiles | join(' ') }}
I get below ...
2
votes
1
answer
617
views
Remote command has different umask
ssh user@host "umask" gives 0174
ssh user@host and the umask from server shell gives 0002
Could you please explain how can it happen?
UPD:
Actually, it was /etc/passwd overriding umask.
1
vote
1
answer
405
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How to reliably & portably serialize binary information into POSIX shell
Problem context
I am trying to implement a job orchestrator whose agent/worker programs, connect to machines via an SSH session/shell. I would like to transfer (potentially binary) files to these ...
2
votes
2
answers
4k
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What does SetHandler "proxy:unix:..." do?
What does the Apache "proxy:unix:..." handler do, and where is it documented? I see it used here and there, like:
SetHandler "proxy:unix:..."
For example in this recent question, ...
-1
votes
1
answer
270
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Can somebody help me on how to zip these individual log files within while loop
I am able to break o/p of a big logfile (filename.log) into individual log files of 1 min each (filename.log.140108) using while loop, but I want these files to be saved as zip files due to capacity ...
0
votes
0
answers
205
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apache + fastcgi - how to run processes for another user
I move legacy python website that works with Apache + FastCGI to VPS from shared hosting - so need to configure everything myself.
All website scripts/static/etc are stored for user 'user1' and I've ...
0
votes
1
answer
776
views
Issues with "force user" on Samba 4.7 + Active Directory authentication
We have a environment with a Samba 4.7 with couple shares that uses Active Directory as authentication mode and a Oracle application drop some files so users get it through those shares.
We have a ...
0
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0
answers
77
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How To Change /Lib Directory
Production server / is only 50GB and it's full.
23GB is in /lib | /snapd 11GB /flatpak 7GB
I see the snap store is installing snaps to /var/lib/snapd | I have a second drive /dev/sdb that has 500GB of ...
2
votes
2
answers
4k
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Memory Ballooning in Linux/Unix on VMware ESXi
I need help to reclaim the ballooned memory in a Linux/Unix machine. Please help me out. I found some solutions but they are not feasible for me on the production server.
I just need to know how can I ...
0
votes
1
answer
749
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The maximum number of file handles (ulimit -n) allowed for Domino is 4096
I have a setup with many Domino servers (installed mostly on UNIX).
From time to time on some servers we see such warnings
[001555:000047-0000123123123123] 09/13/2020 12:18:35 PM WARNING: The
...
1
vote
0
answers
139
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Difference between 'sudo gem install something' and 'gem install something'
In this case I'm using gem as an example, but I think it can be extended to any other program.
I use a Mac and I installed rails using command gem install rails from directory /Users/myusername/...
1
vote
1
answer
76
views
How do permissions work?
I stumbled upon something odd (for me at least) when using CloudLinux for the first time. I'm a long time Ubuntu user, I would still consider myself novice, though.
I've installed Nginx with PHP-FPM ...
0
votes
1
answer
814
views
wtmp contains IP and not hostnames UNIX
while viewing list of last logins in Unix remote server able to see only IP adresses and not hostnames.
how to define wtmp to show host names and not IP adresses?
2
votes
1
answer
159
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specifying complex permissions on files and folder in unix
At work I manage a group responsible for data management and security. We have a need to specify complex permissions on files and folders beyond just the standard user/group/world rwx. Research shows ...
1
vote
0
answers
98
views
Difference between machine/processor/hardware-platform
In using the uname command the following three options gives me the same output:
ubuntu@ip-172:~/asm/asm$ uname -p
# x86_64
ubuntu@ip-172:~/asm/asm$ uname -i
# x86_64
ubuntu@ip-172:~/asm/asm$ uname -m
...
0
votes
1
answer
30
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How can I find all files with access rights only for current user and no access for anyone else
How can I find all files with access rights only for me on my home directory and no access for anyone else?
0
votes
1
answer
945
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passwordless change user with `sudo su -`
I want that on my server fox user can be/change user and be user42 in a passwordless way (fox user have no password they loging with SSH keys)::
srv6:/etc# grep user42 /etc/sudoers
fox ALL=(ALL:...
0
votes
1
answer
617
views
How to set seprate current directory for sftp in macos?
On my macos i am able to login to sftp as sftp localhost. When i run !pwd it shows me default directory is /Users/username but i want to change it /Users/username/Sites/wordpress.
I edited /etc/ssh/...
-1
votes
1
answer
768
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how to run multiple instances of asterisk on one server
hope everybody is safe during challenging time
i have a task to automate our demo installation process.
Our software is mainly a GUI that operates with asterisk via AGI and stores all data to MySQL / ...
0
votes
1
answer
384
views
My Server is sending malicious SSH requests [duplicate]
I am facing weird issue on my server (Unix). There are couple vendors reported me that my server is sending malicious requests to their server by using SSH Protocol.
I have already checked the system ...
1
vote
1
answer
6k
views
MYSQL Start unit not found
Im using AWS Linux 2 AMI
Currently I have AWS EC2
Recently the mysql doesn't work anymore but it worked before.
when I tried to do this
sudo service mysql start
or
sudo service mysqld start
It ...
0
votes
0
answers
883
views
Trying to get SSH output from within a for loop in a script
I'm trying to SSH into a bunch of hosts in order, and run a command to get a list of users on each one. Outside of a for loop, the output shows up just fine one-by-one. Inside a for loop, it ...
0
votes
1
answer
58
views
Does tar create point-in-time snapshots?
I know that tar can be used to create a backup.
However I wonder if the operation creates point-in-time backups or not.
Basically I wonder if it grants consistency if the directory and files are ...
-2
votes
1
answer
4k
views
Bad Mask /29 for address 172.24.59.0 255.255.255.248 cisco packet tracer [closed]
I received this error Bad Mask /29 for address 172.24.59.0 255.255.255.248 Why was this error produced?
and what is the valid host range for the 255.255.255.248 subnet?
would the correct answer ...
0
votes
1
answer
139
views
How do I list long running shell script?
Currently we are running lot of UNIX shell scripts in HP-UX. We want to track which scripts are running long time (more than 1 day), how can we track that?
Furthermore I want to list long running UNIX ...
0
votes
1
answer
1k
views
Which the Lowest Possible Solaris Version which supports TLS 1.2?
I am currently using Solaris 5.8,with TLS 1.0, but now i would like to upgrade to TLS 1.2.
Since Solaris 5.8 doesnt support TLS 1.2.
What is the minimal upgrade i need to do( solaris Version) to use ...
0
votes
1
answer
40
views
Guaranteed rename logfile AFTER logfile is no longer being written to
I have the following set up.
In a remote machine I have a process continuously running which subscribes to some data and writes it to stdout (lets call the process the subscriber). I call the ...
0
votes
1
answer
2k
views
Using su with service account for management
We're going through the arduous process of configuring sudoers for least privilege. We were going over what was needed in a meeting and our manager recommended that rather than use our own account ...
0
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2
answers
2k
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how do i extend pv when extending vmware disk?
I extend the disk in vmware
after doing so I get the configuration but how to extend the pv /dev/sda1 at 30G to later extend the vg?
I don't want to extend the partition with fdisk I just want to ...
3
votes
2
answers
19k
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NTP time sync failures on Debian
This is on HypriotOS (Debian GNU/Linux 10) running on RaPi.
$ timedatectl show-timesync
Failed to parse bus message: Connection timed out
Then do this with sudo:
$ sudo timedatectl timesync-status
...
0
votes
1
answer
50
views
can logstash package individual log types into packages an scp them over to a central node?
I am curious whether logstash only processes logs and streams them at the event/line level or can it package all apache access logs for example and send them over zipped up to a central node?
0
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1
answer
214
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FEDORA IPTABLES Block specific IP Address
The below is the rule that i had added to my iptables.. Still the result of the below rules for me is ssh is blocked from everywhere..
Chain INPUT (policy ACCEPT)
target prot opt source ...
0
votes
2
answers
970
views
Copy binary file from other system with builtin shell commands only
I accidentally just have removed critical shared library and no one dynamically linked executable can't be run now. For example, even /bin/ls shows error while loading shared libraries: libunwind.so....
1
vote
1
answer
1k
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IPv6 ULA ( Unique Local Address ) Generation
RFC4193 contains pseudo code for generation of IPv6 ULA (Unique Local Address). Do I have to follow this algorithm or is an arbitrary ULA valid?
3.2.2. Sample Code for Pseudo-Random Global ID ...
2
votes
0
answers
101
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SmartOS "/ filesystem full"
Last week I had issue where SmartOS wouldn't boot suddenly(off USB), it just hanged there after "mDNSPlatformRawTime went backwards by 3684530 ticks..." warning. I think this one used to appear at ...
0
votes
1
answer
3k
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vsftpd: ftp: setsockopt (ignored): Permission denied
I'm trying to upload things to my server however I'm unable to ls inside a directory or upload a file to it.
I'm using CentOS 8, SELinux set on permisssive. The directory I want to operate on has 777 ...
0
votes
0
answers
118
views
unable to start libvirtd daemon as root user and normal user
I am trying to start libvirtd daemon with following command.
systemctl enable --now libvirtd
As normal user, I am asked for authentication to manage system service or unit files.
So, I tried after ...
-7
votes
1
answer
76
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What happens when I perform this as root [closed]
(don't try this!)
lsof -i | head 100 | xargs rm-r
After executing this I'm not able to login as it removed /bin/bash. Reboot also don't work. Shows kernel error and server crashed.