Tagged Questions

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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1
vote
2answers
26 views

What is the difference between truss -D and truss -E?

I am currently analyzing a command on Solaris that reads from a file and has very low performance. The truss -D commands shows me read system calls taking up to 0.03 seconds, but when I use truss -E, ...
1
vote
1answer
28 views

Ubuntu Server 14.04LTS Swappiness for server with 16GB memory

(don't worry I'm not asking what my setting should be, asking for the theory behind some conflicting advice I've read) My application is one that is lightweight and not under much load, but needs to ...
0
votes
1answer
10 views

Need to configure a openedge progress database server. [closed]

I need to configure a openedge database server on windows /Unix. Could any body help with the basic steps ,like how to start the admin server.
-2
votes
2answers
27 views

assign variable in puppet

I am newbie to puppet, I have code like below in unix log_exts=$(vgdisplay /dev/cassandra|grep Free|awk '{print $5}') if lvcreate -n lv_cas -l ${log_exts} /dev/cassandra then mkfs -v -t ext4 ...
0
votes
0answers
17 views

Emulating /etc/cron.d/ on OSX [migrated]

On most modern unixes, cron supports individual crontab files in /etc/cron.d, in which each task executes as a specified user. These files automatically update the crontab once edited. They allow ...
0
votes
1answer
16 views

Exim need to send mail off server

Never needed to set up a mail server before. I've got exim up and running perfectly fine. When I send an email using command line to my.email@gmail.com it works wonderfully, arrives from ...
1
vote
2answers
117 views

Expect script error send: Spawn id exp4 not open while executing

Update: Working code added here for others CREDITS to : http://serverfault.com/users/30957/glenn-jackman @Glenn I'm sorry! just apologizing and I mean it! Sorry Glenn your code need few changes ...
0
votes
1answer
21 views

Pipe multiple files into one tar gz

I'd like to call mysqldump to create multiple backup files and then archive them in one tar.gz. I am following this tutorial on mysqldump part: ...
3
votes
3answers
51 views

How to pass command output as several arguments to another command

I have a command that produce a output like this: $./command1 word1 word2 word3 I want to pass this three words as arguments to another command like this: $ command2 word1 word2 word3 How to pass ...
0
votes
2answers
25 views

Unzip piping order

I have a file, foo.zip which looks something like this: foo.zip -- fileA.txt -- fileB.txt I can pipe the output of the extracted files like this: unzip -p foo.zip *.txt | something My problem is ...
6
votes
2answers
111 views

Calling sync/fsync slows IO after 30 minutes uptime

After 30 minutes of uptime using Ubuntu 14.04 with an ext4 hybrid SSD I see many processes blocking IO using iotop. The root cause of this slowdown has been traced back to the Unix system call sync. ...
0
votes
1answer
58 views

uWSGI cannot load virtualenv

I'm setting up a Python app using nginx and uWSGI. My dependencies are in a virtualenv. If I activate the virtualenv manually, everything works by running this command: uwsgi --ini uwsgi.ini But if ...
0
votes
1answer
18 views

how to configuring vagrant to allow some specific IP to be available on a windows machine?

I have Vagrant installed on my windows machine. I am using putty to ssh to the ubuntu machine. Lets say that I need some specific service (let's say a graphite for stats) which should be reached with ...
-2
votes
2answers
75 views

How do I pipe the output of the journalctl to cURL? [closed]

I am trying to send logs to a remote server using curl. I tried the following command and nothing happened journalctl -o json -f | curl -H "content-type:application/json" -d @- http://logs Any ...
0
votes
0answers
35 views

no record of login thru phpseclib

I am having a strange problem. I am using phpseclib to communicate with one of our server server - 10.0.0.2 my pc client - 10.0.0.1 I am accessing it via 10.0.0.1 when i hit "last -n 10" i cannot ...
-1
votes
2answers
47 views

Compare files/folders across servers [closed]

We have two Unix servers, spread across two countries. These servers hold our software repository (scripts, binaries, documents etc). I am looking for a simple way to keep these servers in sync ...
0
votes
1answer
30 views

How to git add list of files from git diff

I accidentally added a bunch of cache files into the repo. I've now removed them and now want to commit the change to the repo. So I tried to do the following, but git doesn't seem to like it: git ...
1
vote
1answer
53 views

Puppet template if defined syntax

I am having trouble finding a solution in Puppet documents. I am trying to define a variable in Puppet template. For example: If class graylog2 and apache are defined in node class section then the ...
0
votes
1answer
71 views

Cannot mount an existing EBS on AWS

I tried mounting an existing EBS Storage (which has data) to an instance, but it keeps throwing this error. mount: wrong fs type, bad option, bad superblock on /dev/xvdf, missing codepage or ...
0
votes
0answers
18 views

w Reports A Process of A Deleted User

the w command reports the following: adm1@prdsvr:/home/adm1> w 10:18AM up 13 days, 15:04, 6 users, load average: 0.00, 0.00, 0.01 User tty login@ idle JCPU PCPU ...
2
votes
2answers
75 views

How to control the rate of automatic restarts of a runit service?

I have this runit service with run and log/run scripts properly working. As it happens, the service itself can crash for external reasons and might not be able to start for many minutes. The default ...
0
votes
0answers
54 views

Setting Samba passwords using Chef without storing plain text passwords in data bags

We have a server that is configured using Chef. Currently, the way that chef manages the passwords is by simply copying down the samba tdb databases and updating the shadow hashes of each user. ...
1
vote
1answer
76 views

Should I create ZFS zpools with whole disks or partitions?

I am making zpools on FreeBSD machine. While creating zpools i observe these two cases:- If i take raw disks and create zpool then i am able to form zpools and they are working perfectly. If i ...
-2
votes
1answer
16 views

DocumentRoot Path in browser?

I'm using Apache v2.2.26 on Mavericks and I am unable to understand why http://localhost/~username/Sites/ returns a 404 error, when, in fact the directory, Sites, exists, whereas ...
0
votes
0answers
22 views

Collectd types.db save unix epoch time

I am trying to save unix epoch time to collectd and get it out with command: collectctl getval servername/stime/execstime The output I get is showed like this: value=9.998742e-01 The type I am ...
0
votes
0answers
21 views

Tru64 UNIX Does Not Respond

We had our old Tru64 UNIX system on an AlphaServer 400 233 crash today with I/O errors. From what I've read and the error outputs it appears that the drive containing the /usr partition is toast, and ...
2
votes
1answer
138 views

chattr - How to change file +i attribute without using chattr

Here`s the problem. My server got probably hacked. I would like to change a config file, but it is immutable (has the +i attribute), so I can't edit it. trying to execute a "chattr -i" on the file ...
0
votes
1answer
35 views

TOP processes by system time

I have a system running 2 processes - MySQL and Java I'm seeing 20-30% of the time spent in %system. I've looked around to try and find a way to identify which what the balance of the system time is ...
-1
votes
1answer
46 views

How to share my linux folder with mac mini over nfs [closed]

I tried to mount using following command after exporting the folder in linux source machine ( NFS server) . sudo mount -t nfs -o resvport,rw 192.168.12.10:/home/pavunkumar /private/nfs It is ...
3
votes
1answer
97 views

Troubleshooting DNS issue

I am trying to troubleshoot a DNS issue I am currently having with a new project host on an AWS EC2 instance. It is a brand new domain, and I have already updated the nameservers on the registrar ...
4
votes
1answer
100 views

How to trigger cross-platform jobs between Windows and Unix

I have an application which has components on Windows and Unix. I need to run overnight jobs which initiate tasks/jobs on both environment. These need to be sequenced so I cannot simple use Cron / ...
-4
votes
2answers
66 views

Closed source alternative to Linux? [closed]

Is there any closed source alternative to Linux that's still actively used and developed? I'm looking for a good, expensive Unix-like OS please. The only other OS's that come to my mind are the ...
3
votes
1answer
60 views

screen in screen, detach only last one

I have strange issue on my hands. I have opened (GNU) screen for one serial console and in that same console I have opened another screen to another serial console. It was working but I am now ...
1
vote
2answers
79 views

My reverse zone doesn't work

I'm trying to configure my reverse zones on Centos server. I've read many articles and it looks like I'm doing everything right and don't know what to check or fix next. The following is a part of my ...
1
vote
1answer
69 views

Upload files from vsftpd ftp client in /tmp and once they are uploaded, move them to original folder

I'm having issues with my application. The scenario is that, there is a php cron which is running every 1 minute and it processes the uploads folder, wherein, files are uploaded via ftp ...
-1
votes
4answers
233 views

need to make password less login for same linux server with same user [duplicate]

I need to make passwordless login for same linux server with same user. [airwide@eir ~]$ hostname -i 10.3.7.73 [airwide@eir ~]$ ssh airwide@10.3.7.73 airwide@10.3.7.73's password: how can make to ...
4
votes
2answers
230 views

Is “sudo su -” considered a bad practice?

Background I know the difference between su -, sudo su -, and sudo <command>: su - - switches user to root, requires the root password sudo su - - switches user to root, requires only the ...
0
votes
2answers
73 views

Find Users without a password in UNIX AIX

I'm searching for a script that finds users who don't have a password. Could anybody please explain me the commands that are needed in such a script?
2
votes
1answer
84 views

TCP traceroute works fine but not UDP

So I ran into this issue where doing traceroute some-server.abc.com returned *** for multiple lines and finally reached maximum hops limit. Doing a traceroute -T some-server.abc.com works perfectly ...
1
vote
2answers
63 views

Unusual results returned by df, what caused it, how to fix?

Here is a copy-paste: root@****#df -h /var Filesystem size used avail capacity Mounted on /dev/md/dsk/d4 9.8G 8192E 0K 90204286294657% /var
-2
votes
1answer
47 views

How can I copy files by creating symlinks?

I want to traverse a filesystem and copy parts of it to another filesystem by creating symlinks instead of copying anything. rsync would be ideal if it had something like a --local-copy-via-symlink ...
3
votes
1answer
888 views

No space left on device - wrong size

I'm running an FreeBSD dedicated server. I am getting messages that I have ran out of space on the device. df -h is saying that I have no space left but du -sh /* doesn't even show the directiories ...
-1
votes
1answer
130 views

Unable to connect to localhost or local ip but can connect to other servers or websites

I have a server with nginx|bind|mysql installed, everything is working fine but I am unable to connect to localhost or any websites hosted on server. I tried pinging and wget and none of them work ...
0
votes
0answers
200 views

Unexpected EOF write error

We have a Sun Solaris 10 server that is failing to backup using tar to write to tape. tar cEf /dev/rmt/0cn . The complete error is tar: write error: unexpected EOF tar error code 2 The ...
2
votes
1answer
74 views

Configure range of virtual user names with same password

I would appreciate if there is anybody who can advise me if the following FTP configuration is possible. I need range of read-only users that follow this pattern: (_[0-9]{15}) e.g., ...
3
votes
1answer
314 views

sudo still ask for password when NOPASSWD is used

I read all sudo posts on serverfault, but I still cannot figure out what I'm doing wrong. Normally I finally find the solution but not this time : I want apache user to be able to execute this ...
0
votes
1answer
34 views

Strange behavour of which in a shell script launched as a forked process

So I have a java process that is doing some automation. One of the things it has to do is find the JDK home on random machines. So I wrote a shell script to try and find the JDK home assuming that ...
3
votes
3answers
2k views

How do I do 'mount --bind' in /etc/fstab?

I'm trying to figure out how to add "mount --bind /proc/ /chroot/mysql/proc" to /etc/fstab, but how can I to do this?
0
votes
2answers
284 views

I'm on Windows. How to get time of a remote linux host [closed]

I'm trying to find a Windows command that retrieves the current time of a remote Linux\UNIX host. I know I can use ssh but I'd like to know for alternatives that do not require user and password. ...
2
votes
1answer
66 views

Unix hosts file order

For a long time I never even noticed but I made wrong /etc/hosts configuration on many machines. The order by the manual: 127.0.0.1 localhost 192.168.1.10 foo.example.org foo ...