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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Intermediate mail server [on hold]

I need to deploy a local mail server to download the messages and send the messages throught the external mail server. People will only connect to the local server, even if they are across the globe. ...
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4answers
26k views

Find out if user name exists

How can I find out, in a shell script, whether a given user name exists on the current system? /etc/passwd and /etc/shadow are incomplete. Consider OS X's Directory Services, or Linux with Likewise ...
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1answer
10 views

How can I swap patterns in filenames?

I have a folder of files with names like thing.y.big.png thing.y.small.png thing.xxx.big.png thing.xxx.small.png and I would like to rename them so that the 2nd and 3rd "fields" are swapped. In the ...
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1answer
15 views

How to create filename.tar.Z file on SunOS operatting system

I am trying to create filename.tar.Z file using single command on SunOS but it doesn’t seem to work: bash-3.2$ tar c DIR | compress >DIR.tar.Z tar: /dev/rmt/0: Permission denied bash-3.2$ Other ...
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2answers
43 views

unix Command doesn't work

The command: tar c DIR | compress >DIR.tar.Z which works on a Debian-based Linux, fails on SunOS. Why?
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1answer
18 views

How to handle a condition when an expect script executing another script on a remote host is interrupted?

Im using an expect script to say xyz.exp to login to a remote host and execute another script abc.sh Now most of the times abc.sh runs fine, but there is a scenario where if a certain condition is ...
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0answers
89 views

ZIP and copy backup from Windows server to Unix

I have a Windows application server which is working on weblogic. Everyday backup is happening for the server itself – it is increasing the load on the server. I have an HP Unix server for backup ...
2
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3answers
2k views

How to test stability of wireless router

I had a wireless router that would intermittently drop connections, so I had switched to using a different router. I have since updated the firmware on the problematic router. Is there an easy way to ...
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4answers
12k views

How can I select and delete lines of text in vi?

If I want to select particular text of line and delete lines, how can I do that in vi (give the simplest means)?
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1answer
41 views

Common tips for compressing/extracting large folders? [closed]

Are there any common tehniques or issues I need to be aware that can speed up or make more robust the process of compressing/uncompresing large (>60gig) folders with many (>3000 files) elements ...
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1answer
13 views

Assign Substr of a string to a variable

I am new to unix script. i am asked to modify a ksh script. it requires i assign a substring of a string to another variable. I tried below and its not working GET_OLDEST_FILE=`ls -ltr ...
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0answers
9 views

umask linux incorrect file permissions

id buser - umask 0022 - group - appgrp directory /sample/sftp getfacl sftp # file: sftp # owner: appsdr # group: appgrp user::rwx user:590:rwx user:15003:rwx group::rwx mask::rwx other::r-x now ...
2
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4answers
711 views

Why is my sudo generated file owned by root?

When I run '# sudo touch newfile' my expectation was that the file would be owned by me, not by root, as my understanding of sudo is that it is giving me, the user, root priviledges but does not ...
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0answers
29 views

Trying to create poor man's PowerBroker

For those of you who are not familiar with PoerBroker, it is somewhat of a sudo on steroids. I know it has much more than just giving you super user abilities but this time I am only concerned about ...
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4answers
8k views

How to kill all the processes that have dates older than today?

I issue the command ps -aux | grep tony. It displays the following output tony 10986 0.0 0.0 33532 464 ? S Feb01 0:00 vncconfig -iconic tony 10988 0.0 0.0 86012 512 ? ...
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0answers
10 views

How to read CPU load with Java on AIX

I checked /proc FS on AIX 6.1 in order to get some values for CPU load but unfortunately I could not find anything useful. Is there any text file in AIX which I can use to get these values similar ...
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2answers
5k views

How to move files to hdfs in hadoop using unix command

I have 2 directories "dft" and "hdfs" in the unpacked Hadoop folder. I am trying to copy the file(StartUnit.txt) in dft into hdfs. The corresponding command and exception are as shown below ...
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3answers
549 views

Unix sort keys cause performance problems

My data: It's a 71 MB file with 1.5 million rows. It has 6 fields All six fields combine to form a unique key - so that's what I need to sort on. Sort statement: sort -t ',' -k1,1 -k2,2 -k3,3 ...
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1answer
42 views

How can I enable tab completion for a fish function/alias?

Probably easier to just use an example here. I have a function ss that just calls: sudo systemctl $argv Tab completion works fine with the full command, but not for the ss function. I.e., ss start ...
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0answers
16 views

changing the ownership to subfolders will affect the other folder owned by the same user?

I would need full access to the subfolder A owned by user xxxxx .(unknown may be moved out of organization) The parent folder is owned by root. Whether I am able to achieve this by changing the ...
3
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1answer
3k views

Need to copy a file from unix box to windows folder using pscp command

I have a unix svr A: username: uname password: pwd then there are some files under /usr/local/jboss/configuration which are accessible only when a 'sudo su' command is performed. (and the username ...
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7answers
792 views

Is there any functional-like unix shell?

I'm (really) newbie to functional programming (in fact only had contact with it using python) but seems to be a good approach for some list-intensive tasks in a shell environment. I'd love to do ...
3
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1answer
2k views

How do I move a linked file on Unix?

I have a bunch of files in one directory and links to each one of those files in another directory. So ls -l looks something like this: lrwxrwxrwx 1 rembol rembol 89 Jan 25 10:00 copyright.txt ...
3
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1answer
13k views

How to change user in winSCP?

I'm using winSCP to access Unix computers. How can I change user after I have logged into a Unix server using winSCP? E.g. I have personal account in unix computer A. I can log into this comp using ...
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7answers
5k views

How to make Emacs read buffer from stdin on start?

With Vim I can easily do $ echo 123 | vim - Is it possible to do with Emacs? $ echo 123 | emacs23 ... Emacs starts with a Welcome message $ echo 123 | emacs23 - ... Emacs starts with an empty ...
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2answers
4k views

Ubuntu : This does not look like a tar archive

I am trying to run the following command after I have downloaded a tar file using the sudo wget command to install CasperJS on our Ubuntu box. sudo tar -xvf casperjs.tar This does not look like a ...
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0answers
12 views

How do I set $LESS invocation options in a lesskey file?

I'm trying to use less's lesskey-file support, as described in the manpage: KEY BINDINGS You may define your own less commands by using the program lesskey (1) to create a lesskey file. This ...
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2answers
23 views

Wildcard not working in cp command when using exec

I want to copy all the files in all the directories to the parent directory, but I get the error ./img/* is not a directory For example. Here is the command that I used. Is there a better way to do ...
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4answers
15k views

Copy from remote server to my laptop via ssh

I am on centos server (via SSH) and I don't want to open file manager to copy dump file. What comand whould I use (scp or what) to copy that file from remote server directly to my comp. like cp ...
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4answers
47 views

Please explain the man page of command mv

I understand if I mv foo.file boo.file, I just rename foo.file to boo.file, and if I mv dir1/foo.file dir2/boo.file, I delete dir1/foo.file and make a copy of that to dir2 and rename it as boo.file. ...
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0answers
23 views

How can I automatically run two commands in different screen windows with an argument?

My process is ctrl+a 0 command $1 ctrl+a 1 /join#$1 I'd like to shorten it down to one command.
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49 views

Windows 10 Technical Preview: running custom commands

I have recently installed the Windows 10 Technical Preview and like using unix in my terminal. When I had Windows 8 I used a very lightweight application called gow that installed a few unix commands ...
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1answer
35 views

Unix Script: Wait until a file exists

I need a script that will wait for a (examplefile.txt) to appear in the /tmp directory and once it's found to stop the program, otherwise to sleep the file until it's located So far I have: if [ ! ...
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3answers
3k views

Find and replace string in a list of filenames

I have a couple of files like so, (on Mac OS X): product-103-footer.tpl product-103-header.tpl product-103.tpl I want to replace '103' in all the filenames with something else using grep and sed, ...
0
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1answer
36 views

How to find the total number of processes in Unix/Linux shell script

I’m trying to find the total lines of running processes excepting the commands I’m using to create the listing. Then to parse out the userID and the PID into a new list. All within the same shell. ...
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6answers
16k views

On Linux/Unix, does .tar.gz versus .zip matter?

Cross-platform programs are sometimes distributed as .tar.gz for the Unix version and .zip for the Windows version. This makes sense when the contents of each must be different. If, however, the ...
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1answer
154 views

Terminal highlighting and auto complete

Do you know some plugin for highlighting and autocomplete in postgreSQL terminal?
0
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1answer
10 views

tree will not descend into directories

I just unpacked a tar file with a folder in it. I did a tree -F and saw asterisks popping everywhere. All of the files (even png, txt, etc) were marked as executable. So I did what any sensible human ...
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0answers
17 views

Why do UIDs start at 0 but PIDs start at 1 in Unix?

During a discussion of Unix operating system concepts, the question was raised, and no one really seemed to be sure. It seems against "the Unix Way" for things to be inconsistent that way, yet it ...
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0answers
14 views

System Partitions Over Two Drives

I have a machine with two drives a Compact Flash card (CF) and a Solid State Drive (SSD). Recently I have been experiencing failures of both the SSD and the CF. When I sent these back to the ...
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1answer
2k views

Unix Copy (cp) without Symbolic Links

I want to copy my files but convert the symbolic links to hard links (ie. the actual file). How can I do this? Here's my code (that isn't working): cp -RL ${FROM_DIR} ${TO_DIR} Note: this is for ...
1
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5answers
170 views

Using standard unix commands, how do you grab a bunch of lines?

I have several text files with this format: name: john address: bay area phone: 6505561234 image: /work/myimage.png name: stark dob: 5AD shirt color: red physical address: Westros phone model: S2 ...
4
votes
3answers
5k views

BASH - merge directories when using mv

I just started using BASH, so I can move all contents of a directory to another. But the issue is, I was expecting it to merge the directories. I am using cron job to run this script. #!/bin/bash ...
1
vote
1answer
52 views

file exists not working in expect script

I'm trying to check if a particular line exists in filename on a host. So only if the particular pattern is found from the grep command a dummy.txt will be created. Then I want to check if dummy.txt ...
6
votes
2answers
3k views

Multiple crontabs for one user

is there a way to use multiple crontab files for one user? Thinking something along the lines of crontab file per project instead of crontab per user... Any help is appreciated...
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2answers
22 views

Not creating new file while output redirection

I'm using this for output redirection: cat filename | grep 'dis' | wc -l > test.txt But I do not want a zero byte file created if no result is found from the grep command. Is there any way this ...
2
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2answers
3k views

How can I make `find` find files in reverse chronological order?

I want to find files in subdirectories sorted by timestamp (of creation), with most recent first. I have looked at the man page but it seems to only seems to let you filter by timestamp rather than ...
0
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1answer
3k views

ksh Auto-Completion PuTTY Configuration

I'm having a bit of a problem configuring my PuTTY client to work with the auto-completion feature in the ksh shell. I do a listing on the root with the directories /home and /homeroot and it returns ...
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0answers
738 views

How can I copy files recursively without overwriting the directories

On linux, let's say I have some files like this: dir1/file1 dir2/file2 and I want to copy them to a destination that already have dir1 and dir2 and looks like: dir1/file1 dir1/file1a dir2/file2 ...
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0answers
22 views

ArchLinux can't install perl-wx

I am trying to install perl-wx from the AUR Repo with yaourt, but can't get it to work. I have tried "export LC_ALL=C". Still an error occurred during the check. Maybe you can help me? Pastebin: ...