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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How to extract the Subject Alternative Name from a CSR by just using the openssl command?

I would need to extract the Subject Alternative Name from a CSR. Is there any way I can extract this other than using the "-text" in openssl req -in test.csr -text -noout? (Maybe similar with the ...
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20 views

shell script finish but doesn't exit

I have 2 shell script a.sh and b.sh which is running under ksh. a.sh does the following action #!/bin/ksh some action check condition and send email if fail or success call b.sh b.sh does the ...
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1answer
18 views

What is .funcrc?

I have not been able to find any information on why this file exists or what should go inside it through the usual channels of investigation. This is why I am asking here in the hopes of eliciting an ...
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1answer
38 views

How can I open a port in my Mac OS X yosemite(firewall)?

I have a java-based server(jar file) and it is running on port 8080. It is running well on my localhost, but I can't access it through other networks I think it's a firewall issue. so, First, I ...
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2answers
27 views

Auto execute program when usb is plugged in

As in the title I need to execute a program inside a USB when it is plugged in a PC. I don't refer to autorun. Example: I plug in my PC an USB which contains runme.exe (or .bat), a program that writes ...
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4answers
52 views

fdisk - do i need it or can i make a filesystem directly?

i read about fdisk being able to creation partition / which is to break down a physical disk into several logical partitions. If i intend to utilize the whole disk as a whole, is it still necessary ...
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3answers
62 views

Why is router IP not listed in ifconfig?

I am looking for the address that I type into my browser to get to the router configuration file. It ended up being 192.168.1.1, as usual. But when I enter ifconfig into the command line, this IP ...
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1answer
25 views

Understanding fdisk -l output and calculating storage

I have basic understanding of disk. (Please correct me if i am wrong) I understand on 1 platter, there are 2 heads, 1 on top, and 1 on bottom. Both side of the platter is able to provide storage ? On ...
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1answer
24 views

Bash - enable execution only if script is run from a specific directory

I need to write a shell script that can only be executed if it is run from the home directory of the currently signed-in user, and I have no idea how to check that from the script itself. Any help ...
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2answers
23 views

How to reflect changes in PATH as done by a user script

I have a script which does some basic root PATH integrity check and inputs a line in ~/.bash_profile to source my script, so that changes my script made in root's PATH is permanent across restarts: ...
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0answers
7 views

Proxy to network interface based on port

I'm looking for http proxy, which will forward traffic to the specific network interface. Example: Client connect on port 5000 - forward to eth0 on port 80 Client connect on port 5001 - forward to ...
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1answer
47 views

udev symbolic links - where is /dev/sda pointing to

It is said that udev create symbolic links identifying the actual device and /dev/disk/by-uuid is an example. [root@centos1 by-uuid]# pwd /dev/disk/by-uuid [root@centos1 by-uuid]# ls ...
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2answers
28 views

udev - am i using it, where do i see it?

It is mentioned that udev present devices in /dev for devices that are presented to the kernel and it is use to create persistent naming. I have having 2 harddisk /dev/sda /dev/sdb. How does ...
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1answer
21 views

grep returns no results

Came up to a strange problem - was running a trivial command grep -F "INSERT" new.sql >& output.txt on a new.sql that is 76MB large. The funny thing here is that none results are returned ...
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1answer
14 views

why do i keep getting the same $SHELL even i am on a different shell already

[oracle@SJOAM ~]$ echo $SHELL /bin/bash [oracle@SJOAM ~]$ sh sh-4.1$ echo $SHELL /bin/bash sh-4.1$ csh [oracle@SJOAM ~]$ echo $SHELL /bin/bash Why am i always in bash !? but the prompt are already ...
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3answers
36 views

Is it possible to cd with command line through a folder to a shortcut

I have a shortcut to a folder on my Desktop (as I don't store files directly on it). Is it possible to get to the directory the shortcut points to when I am in the desktop on command line? I would ...
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4answers
80 views

How to open tar gz file created using tar piped to gzip

I wanted to generate a tar gz file with the highest compression level, and I followed the solution from http://superuser.com/a/546509/461740: tar cv /path/to/directory | gzip -9 > file.tar.gz ...
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1answer
26 views

How to pass STDIN to wall in OS X?

https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/wall.1.html The OS X man page seems to be almost identical to the Linux one, at least at the beginning, wherein it ...
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2answers
56 views

Downloading a file from website - what port will be used?

If I go to a website and click on a link to download a file, what will be the protocol that is being use? Is it still HTTP? Will the source port and destination port remain the same? E.g. client (src ...
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2answers
31 views

Guide to writing command documentation [closed]

I am looking for a set of guidelines how to document a Unix/Linux command. For example that argument names are surrounded by <>, optional parameters should be in [] and so on. Where can I find ...
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1answer
36 views

Accidental recursive cp -R, now can't delete file using either Trash or rm

After a mistype in a path when using cp, I seem to have accidentally copied the folder in to itself recursively, and now I can't delete that folder using rm -rf, or the Trash in Mac OS X Finder. The ...
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1answer
24 views

single user vs multi user mode (without networking) init level 1 vs 2

I tried init 1 (single user mode) and i am still able to switch between users. So this leads me to think that maybe other users is not able to login if i have a network (hence single user mode) Then ...
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1answer
29 views

understanding Stats on folder in Linux

This is my stat output on a folder stat Downloads/ File: `Downloads/' Size: 4096 Blocks: 8 IO Block: 4096 directory Device: fd02h/64770d Inode: 259595 Links: 3 What does it ...
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1answer
17 views

How to get files created in last 5 days and form a list for informatica source

Find all the files of the format yyyymmdd_test.txt created in last 5 days. The file may not be available or created for a day in between as well. i.e. for 5th june if following are the available ...
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1answer
28 views

xclock not showing (traditional X without X11 forwarding)

Server A -> 192.168.1.25 Server B -> 192.168.1.26 Both running Centos 6.6 with iptables off. No firewall in between. A$echo $DISPLAY :0.0 A$xclock -- Able to see xclock popup on the A screen ...
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5 views

Mutt using elinks to color html and external pager dilemma

These days more and more HTML emails are being unsed. Unfortunately making mutt render html in color via elinks works only partially due to the fact that the internal pager of mutt overwrites the ...
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1answer
36 views

crontab is not working correctly while script itself calling other script

I have written a script in which I am executing some other .ksh script. When I run the script standalone its working fine however if I run the script through crontab its not working properly. Could ...
1
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1answer
18 views

Zipping / Encryption on Solaris 10

I have a dump file which I am zipping it up -> sending it over a network -> and burning it onto DVD. However, now i would require encryption AES 256 on the dump file. I am running Solaris 10. Is ...
1
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1answer
26 views

Trigger a command upon every `crontab -e` edit

We are using a shared Linux server account where as everyone comes and edits the crontab. Usually we take a backup like this crontab -l > `date +\%Y-\%m-\%d\_\%H:\%M:\%S.txt` Is there an ...
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3answers
38 views

What does “based on” and “derived from” mean in Operating Systems context? [closed]

I have been reading about *nix history and the more I read the more I get confused. I am reading terms like ... is based on ... or ... and ... derived from .... etc. A concrete ...
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1answer
21 views

Unix gzip more than one file at once

I have come to the end of my research with unix:> I'm new with unix and its enviroment, so i need your help guys. Long story short, i have a housekeeping script, which runs daily/weekly (it doesnt ...
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1answer
33 views

Using xhost, display and startx - confused

I have a client A (192.168.1.1)(vncviewer) accessing Server B (192.168.2.1) (RHEL6) to run a installer. The installation pre-requisite is to set the xhost and DISPLAY properly. Q1) Please correct me ...
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3answers
44 views

Unix grep finding file beginning with [pattern]

I would like to find files that begin with a particular pattern i.e. the first line of file should contain the pattern, and then print the first 10 lines of such file, is there a way to do that? Is ...
1
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1answer
21 views

fstab nouser - device still mounted

Please correct me if my understanding is wrong. The nouser option forbids an ordinary (i.e., non-root) user to mount the filesystem. This is the default. In my /etc/fstab, I have: ...
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1answer
43 views

How to mount a encrypted tar file in Linux?

Let us imagine I have encrypted my tar file with gpg as we can see here but I want to mount that with archivemount (e.g.: answer) without holding the unencrypted file on disk. Is it possible? If not, ...
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0answers
16 views

Stopping a process when a given file is accessed

I have a complex script that accesses/creates lots of files, and I'm trying to track down exactly when it creates a file with a given name. What I want is to be able to stop (e.g. as if using Ctrl+Z, ...
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4answers
51 views

what is the unix equivalent to windows command route add

I need to run the command route add -p 123.45.67.8 mask 255.255.255.0 208.00.000.000 on a linux server. what is the unix equivalent?
2
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1answer
59 views

Append text to first occurrence of a pattern using sed

Say there is a text file as below: Hello world types="" Mario types="Game" What I want to do is find the first occurrence of type="" and append with word "program". I need output as: Hello world ...
1
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1answer
23 views

How to set Permissions and Owner/Group to be used for file creation?

Legend: Owner/Group e.g. AccountUser/Nobody On a web server (apache), I have a folder (chmod 775, AccountUser/Nobody) which I move uploaded files into. A web-based script running as Nobody is used ...
0
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1answer
34 views

Remove last column values in field seperated file using unix shell script

The files is seperated by | pipe symbol myfile.txt Hello|how|are|you|hope|you|are|doing|fine Lilly|jasmine|rose|sunflower|nightfire|flowers I want to remove columns greater than 3. I want result ...
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1answer
32 views

Disable audio output of a program

To disable text output we use > dev/null, for example, make > /dev/null But how to similarly disable audio output? For example, skype A>&1 /dev/null or whatever. EDIT: If it's ...
3
votes
1answer
34 views

Can't run default shell

What to do if I uninstalled my default shell (/opt/local/bin/bash)? I can't open terminal under my account unless my default shell is valid or at least exists. Are there any elegant ways to fix it? ...
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0answers
40 views

In Unix, delete a file listed in the directory but missing from the filesystem

I, like an idiot, killed my rm -rf command in the middle of it, and now there's one file remaining, but it keeps saying access is denied. I assumed it was because a process was accessing it, but when ...
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1answer
29 views

Why can't I use my newly created user with chown?

So I am attempting to create a new user and group, and then change ownership of a directory to that new user/group. However, when I do, chown comes back with an "illegal user name" message. Here's a ...
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1answer
39 views

How can I remove a file whose filename has weird characters? [duplicate]

[root@host dir1]# ls -lrt total 412 -rw-r--r-- 1 root root 13747 Jun 3 16:01 -lang?[5~?[5~?[5~?[5~?:q! We tried different ways and they don't work. [root@host dir1]# ls -lrt | tail -1 | awk ...
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0answers
25 views

Can't login on server using ssh [Too many authentication failures]

I'm not able to login in the server. I keep getting this error: Received disconnect from 128.238.182.77: 2: Too many authentication failures for bmpasini It happened to me before and I solved by ...
1
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1answer
38 views

Generating SSH and GnuPG keys on a remote server. Key management best practices

I'm asking about best practices relating to key generation, use, and management. On a few occasions, and for various reasons, I've created SSH and GnuPG keys while logged in over SSH to a remote ...
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2answers
36 views

In Linux, how can I run a process that I can come back to later to give a command after detaching

I'm currently developing a server hosting app (mainly for myself / learning purposes) and everything works great and what not, I don't know how many of you are familiar with Counter-Strike in general, ...
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0answers
17 views

at sends a BCC to an address that doesn't exist

I'm running some pretty long tasks at work and I want to be warned when they finish, wherever I am, so I use at -m with sSMTP to get a notification on my Gmail address. It's my first time playing ...
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3answers
55 views

Check if any two files in a directory are identical?

I'm working on OSX and I have multiple CSV files in a directory. I want to check if any two of them are identical. I've tried: cmp file1.csv file2.csv || echo "files are different" This tells me ...