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.

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Email server configuration still complaining the connection isn't secure

This is a follow up to another question I had, but its quite different so I thought I'd start a new post. Emails bouncing - 454 TLS not available due to temporary reason I'm trying to work out why I ...
Andrew Newby's user avatar
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1 vote
1 answer
2k views

Pass parameter from Local to Sudo user [closed]

Ok if subject is not clear i will explain my doubt.I have a shell script kept at my local user called (executeAdM.sh), and when i execute this script i am connecting to SUDO user by taking commands ...
Tushar Sharma's user avatar
2 votes
1 answer
3k views

During OpenBSD installation, what is "DNS domain name" for?

During the installation of OpenBSD 6.1, right after setting up network interfaces, the installer prompts me: DNS domain name? (e.g. 'bar.com') [my.domain] I am not sure what this setting is for, I ...
Jessica Nowak's user avatar
3 votes
5 answers
382 views

Zipping a folder to create tgz file

I have a folder which i want to create tgz file and compute its sha256: The folder is converted to tgz using following command "tar -c -C #{Shellwords.escape dir} #{Shellwords.escape basename} " \ ...
user93796's user avatar
1 vote
1 answer
989 views

Is it possible to pass environment variables to a newly created user?

In my GitLab CI script, I am creating a new user which then executes a command. I'm noticing that when the command is executed as this user, the CI environment variables aren't available. Below is ...
Anthony's user avatar
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0 answers
216 views

Expect is prompting password twice while spawn

spawn ssh -q [email protected] Password: Password: Expect is expecting null before I sent the password. Debug info expect: does "" (spawn_id exp6) match glob pattern "yes/no"? no "Password: "? no ...
Nivedith Maknoor's user avatar
0 votes
1 answer
1k views

Is it safe to give ownership of files to “daemon”?

I was having trouble uploading files using my CMS (Drupal). When I put more restrictive file permissions on, I could not upload anything. Then I changed the owner of the upload directory and all sub-...
Chris's user avatar
  • 11
0 votes
2 answers
380 views

how to use awk or sed command (OS level commands) in Sybase level

I have one text file in host level Ex: /tmp/file.txt. So I have one script and I need to read the line by line from file.txt, so I used sed command. So I am using while loop in the script and I have ...
DhanaTeja's user avatar
0 votes
1 answer
873 views

SED not working with complicated string

I have a file that starts like this: [global] pid = /var/run/php-fpm/php-fpm.pid error_log = /var/log/php5-fpm.log and want to replace error_log = /var/log/php5-fpm.log with error_log = /var/...
TheNiceGuy's user avatar
0 votes
3 answers
7k views

Remake catalina.out without restart of server

Is it possible to remake a deleted catalina.out on a tomcat server without restarting the server? The catalina.out got accidentally deleted but it's needed due to a funky cluster configuration (4 ...
Em.'s user avatar
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1 vote
2 answers
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New user added but having error in AIX 7.1

I newly add a user name perfmgr in AIX 7.1 using smitty, however when I try to change the password it output and error as below: # passwd perfmgr Changing password for "perfmgr" 3004-616 User "...
MrAZ's user avatar
  • 131
0 votes
1 answer
3k views

supervisord - automatically kills its spwaned processes

I am a new bee with Supervisord. And I am on Ubuntu. My problem is, I have a script to spawn java process using "exec java -cp ....." as the only line in the script. This particular java process is ...
Abhishek Chatterjee's user avatar
0 votes
1 answer
294 views

How to do REORG command on DB2

I want to reorganize(offline) some db2 tables. Also I want to executing runstats command after reorg command. I have a question. Do I need to stop db2 database or deactivate or both of them before ...
tekun's user avatar
  • 3
-2 votes
2 answers
110 views

Which protocol to use for a barebones LAN file upload with mixed Unix and Windows clients

I have a set of about 20 embedded Unix clients who physically move from time to time. When they move into the range of a specific wireless AP, they will push a certain set of files to a Windows file ...
Zimano's user avatar
  • 105
7 votes
0 answers
189 views

Sunsetting Microsoft Identity Management for Unix the right way

I'd like to make sure that we don't have any connections to our AD controllers before sunsetting, but some run Microsoft Identity Management for Unix / Server for NIS. I'm having a dog of a time ...
user228832's user avatar
2 votes
1 answer
3k views

Postfix+saslauthd: pam_unix(smtp:auth): authentication failure

I'm run postfix 2.10 + Cyrus sasl 2.1 + Dovecot 2.2 on Oracle Linux 7. Dovecot works with saslauthd normally, but Postfix always failed on authentication, wish someone can help to check what problem ...
Yun Wang's user avatar
0 votes
1 answer
111 views

How to add dynamic code/ruby code inside .conf file

I'm using Sphinx search engine for my application, and I would like to add ruby code inside the sphinx.conf file to update some values dynamically based on my application server hostname? Is it ...
loganathan's user avatar
0 votes
3 answers
9k views

Pointing 2 urls to the same site on nginx server

We have this website that works well already, but I was put to the task of pointing another url to that very same site. The idea is that two urls will show in the address bar, but just one site will ...
Matt Cremeens's user avatar
-1 votes
2 answers
108 views

Not able to reach azure url

I am trying to reach azure url through my Unix server but not able to reach it. It is sending connection time out and not able to find server from server list every time. Plus I have tried to ping ...
Sharma_Abhinav's user avatar
0 votes
4 answers
3k views

Filesystem full with 'df' but seems actually not

On my AIX 6.1 server, i have a problem on a VIO LPAR. A filesystem seams to be full with the 'df' command, but not with 'du' or 'ls' for example. I searched but I don't understand where the problem ...
cd25_flo's user avatar
-1 votes
2 answers
380 views

How to monitor user reports through shell scripting

I want to monitor I have 3 user in my linux machine let's say a,b,c .By Using last command I am able to identify list of last logged in user and by w command who is logged in and what they are doing ...
Swarup Kumar Mall's user avatar
2 votes
0 answers
43 views

Any equivalent of Entitled Capacity in x86 systems

I've been reading a lot about IBM POWER systems lately and I've been wondering if there is any equivalent to their Entitled capacity concept in x86 architecture. Basically allowing virtual partitions ...
Morish's user avatar
  • 21
15 votes
1 answer
4k views

Potential hijacked SSH session & SSH best practices

I'm freaking out a little bit at the moment. I am SSHing into a remote server that I have recently commissioned. I'm doing this as root. I have installed fail2ban and had a massive amount of banned ...
MarMan29's user avatar
  • 343
2 votes
1 answer
3k views

Block Postgres port 5432 running on Docker container with iptables

I am using Ubuntu 14.04 desktop (Xubuntu to be exact), and trying to block outside access to a locally running Postgres port 5432 with iptables. This is my iptables -S -A INPUT -i lo -p tcp -m tcp --...
garbagecollector's user avatar
1 vote
1 answer
100 views

Merging Large Files Chronologically (UNIX)

We are currently using syslog-ng to dump files to a network storage location. Each day there are 5 .log files that are written by various servers and at the end of the day I need to merge the 5 files ...
Eric's user avatar
  • 1,393
2 votes
1 answer
42 views

How to signal the presence of a pattern via exit code, without altering STDOUT

I need to run cmd1. If and only if PATTERN is missing from its STDOUT, i need to run cmd2 too: cmd1 | grep "$PATTERN" || cmd2 But I'd like to see all output from cmd1, not just the lines that ...
Nils Toedtmann's user avatar
1 vote
1 answer
865 views

Solaris 10 Memory Size different from Physical Memory Size

Why is this? I am not using any zones (global only), so memory capping doesn't seem to be the answer and all the DIMM modules show as enabled with no faults when digging into this from the ILOM. root@...
codenaugh's user avatar
  • 145
5 votes
1 answer
8k views

How to automatically switch to home directory when switching user?

When i ssh to my ubuntu server, i get logged in to my user's home folder. But when i do su otheruser and enter the password, i get logged in as the otheruser but the home directory stays for the ...
user2707590's user avatar
0 votes
1 answer
43 views

Understanding / in crontab

I have found the following entry in our crontab, and wanted to make sure that I have interpreted it correctly: 0 */2 * * * [some command] I am assuming that this means run the command twice a day on ...
paul frith's user avatar
11 votes
1 answer
8k views

delete systemd not-found services

My server shows multiple missing services. How can i delete them from Systemd? They are not-found. systemctl -a shows: multiple not found systemctl reset-failed shows: still shows These (none of ...
Patrik Laszlo's user avatar
1 vote
1 answer
73 views

Configuring denyhosts to ignore cron-jobs

So I recently setup denyhosts for my personal server, and it's working fine, except for the fact that it seems to be processing every single cron session, rather than just external accesses. End ...
Haravikk's user avatar
  • 267
1 vote
1 answer
444 views

Linux equivalent of Unix who -m command, to show original user ID before su?

I'm trying to find a Linux equivalent of running who -m in Unix. In Unix, who -m gives the first user ID you used to log in, before starting any new shell sessions through su, etc. The -m switch to ...
narwahl's user avatar
  • 33
1 vote
1 answer
585 views

Should a deployment user have his shell set to /bin/false?

I deploy web applications by "sandboxing" each application under its own UNIX user account, behind a common nginx reverse proxy that also serves static files. Each account runs the application server, ...
mkaito's user avatar
  • 129
-2 votes
2 answers
1k views

Ubuntu 14 find what is consuming disk space

Have any command to see what is consuming disk space on ubuntu 14? My Ubuntu server has left only 70MB of disk space thank's
japalow's user avatar
2 votes
1 answer
7k views

Linux : Count Open Files for Process

How can I check how many open files are currently used? Checking on PM2 is just an example: I found the PID: ps aux | grep pm2 | awk '{ print $2 }' Checked that there is a limit of 65536 ...
crashoverbike's user avatar
1 vote
0 answers
2k views

Apache - a sudden “Too many open files”

So we have an apache server running in Linux with no issue. Yesterday we made a server restart and since then we noticed that the number of open files by the apache processes is keeping increasing ...
Fatema's user avatar
  • 11
2 votes
0 answers
667 views

Unable to Access SSL-encrypted MAMP site over LAN using Squid proxy (Non-SSL sites working fine)

I've got a development site running on a host machine (mac os x) in MAMP that I want to view on a client machine (and also on mobile devices - all mac os). All are connected to the same LAN (wifi). I ...
nerdlinger's user avatar
0 votes
2 answers
368 views

How to do SSH with -i option and bypassing password entry

Using ssh, I want to access Machine1 --> Machine2 Let's say Machine2 has IP address: 133.165.14.22. I have copied id_rsa.pub from Machine1 to Machine2 Then in Machine2 I have already did this: ...
neversaint's user avatar
0 votes
1 answer
434 views

Packet Sniffer to dynamically create iptables rules

On a router running unix I wish to make monitor all outgoing packets, of these packets I want to temporarily white list IP addresses I am connecting to, to both send and receive. Basically to create ...
user avatar
0 votes
3 answers
82 views

How to output column with special patterns

I have a column, with some words: scatman batman superman scatman scatman batman superman scatman scatman batman superman scatman batman WWWWWWWW superman scatman batman superman scatman I should ...
Valeriu's user avatar
  • 57
-1 votes
2 answers
1k views

Uniq by two columns with two conditions

i have table with columns. In first column, i have time, when the user has logged, in second column, i have a name of user. 13:15:39 fxs1cia1qulm1lk 13:15:39 fxs1cia1qulm1lk 13:15:39 ...
Valeriu's user avatar
  • 57
2 votes
1 answer
3k views

How do I use stress-ng to simulate memory usage?

I found the command stress-ng -c 0 -l 60 which takes up 60% of the CPU. Is there a similar command for taking a certain percentage of the total memory available?
cbll's user avatar
  • 143
2 votes
1 answer
1k views

Many authentication failed logins for "good" users

I have recently notice that my server was reporting at mail.log a lot of bad authentications for know users, and its not a brute force attack. And i really dont know the cause of such authentications. ...
marafado88's user avatar
0 votes
1 answer
46 views

Unable to confirm timezone while setting crontab for different unix users

On our production server, UCT timezone has been set for server i.e. for root user but for local technical user different timezone is set in .base_profile. I want to set cron as per CET but server ...
Mahesh Morankar's user avatar
1 vote
1 answer
2k views

why /var/log/wtmp and /var/log/lastlog have read permission for other users?

In my Linux server lastlog and wtmp files have read permission set for other users (664) . Do we really need to keep the read permission for other users or can I change it to (660 or 640) . Does it ...
Mathews Jose's user avatar
0 votes
1 answer
680 views

Terminate watch command after run completes

I'm using watch in a screenwindow to continually execute a PHP task which processes data every two seconds. Thus, I can logout of the server with it running and can check-in on it. I don't want to ...
Loren's user avatar
  • 233
-1 votes
1 answer
594 views

OpenVpn troubleshooting

I run a VPN with Openvpn on a Debian 8 server. It works kinda well. Sometimes (once a month or every 3 weveks) the tunnel stops running and I have to reboot the server to be able to connect to the ...
avenetj's user avatar
6 votes
2 answers
15k views

How to crash a single process in Linux?

I want to analyse the outcome of my application process when it crashes. How can I manually crash a single process in Linux?
Harikrishnan's user avatar
  • 1,249
0 votes
1 answer
808 views

What is the difference in restricting single user mode with password through /etc/sysconfig/init and /etc/inittab in a Linux system?

I was checking some sites for setting password protection in single user mode login in my Linux server (Oracle Enterprise Linux-OEL) . In some places I saw the steps to add entry into inititab file ...
Mathews Jose's user avatar
0 votes
2 answers
1k views

LD_LIBRARY_PATH Configuration Setup Issues

I am facing a weird but a sensible issue, I have 2 ORACLE_HOMEs, 1st one points to ORACLE Database Software and 2nd one points to ORACLE Client Software. Why I am forced to do this - reason is: In my ...
Gaurav Bhaskar's user avatar

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