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how in unix enter folder with whitespace in name

- by sasquatch

as in topic. How I can do that?

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after changing file from unix to dos it is having empty lines..how to handle this

- by user2814717

After converting file using **unix2dos** command it is having some empty lines. Please help me. How to handle this? I tried to delete empty lines as follow, but couldn't work. $ sed '/^$/d' /tmp/data.txt Hey following examples also didn't work. Pl help This is source data before using unix2dos. ID NAME DATE 1 BALA 09/23/2013 2 KRISHH…

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Complex (?) Unix Text Replace Command

- by Matrym

What's the command line equivalent of: For every file that contains "AAA" within its contents, find "BBB" and replace it with "CCC" Thus, the command would match and replace BBB in a file: <html> <head></head> <body> AAA Hello world! BBB </body> </html> But Not in a file: <html>…

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Limit unix users file access

- by Michael

Hello, I just created a new user on my server, but I only want this user to have access to var/www/ and all the files/folders inside that. They should be able to access no other files on the server except those. How would I do this? Thanks!

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Understanding Unix Permissions (w/ ACL)

- by Dr. DOT

I am trying to set permissions on my server properly. Currently I have a number of directories and files chmod'd at 0777 -- but I am not comfortable with it being this way. So at the advice of a serverfault specialist, I had my hosting provider install ACL on my shared virtual server. When I FTP to the server as my FTP user…

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Unix 'find' command to include/exclude subdirectories

- by Stan

Say the folder structure looks like this: . |--folder1 |--subfolder1 |--subfolder2 |--subfolder2 |--folder2 |--subfolder1 |--subfolder2 |--subfolder2 |--folder3 |--subfolder1 |--subfolder2 I would like to find all files in subfolder2 only. I know I can just do this: $ find . -type f |grep…

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Unix sort 10x slower with keys specified

- by KenFar

My data: It's a 71 MB file with 1.5 million rows. It has 6 fields, four of which are strings of avg. 15 characters, two are integers. Three of the fields are sometimes empty. All six fields combine to form a unique key - and that's what I need to sort on. Sort statement: sort -t ',' -k1,1 -k2,2 -k3,3 -k4,4 -k5,5…

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Tool to run same key strokes on multiple unix machines

- by virtualvoid

I want to run the same commands on multiple machines, I know I can do this using ssh scripting or things like clusterssh, however I don't want to install anything on the server. (Don't have the rights) What I want is to just clone the keystrokes across multiple machines e.g. run cat /etc/oratab on one window and same…

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Remove all files except for a few, from a folder in Unix

- by nikhil

I often face this problem. I have a set of files in a folder and would like to delete all of them except a few. For example: I have files named according to the date of creation (like 11-1-11.tar, 10-1-11.tar and so on). Now I would like to delete files like 10-1-11, 9-1-11 and so on but not some other files.…

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Limiting memory usage and mimimizing swap thrashing on Unix / Linux

- by camelccc

I have a few machines that I machine that I use for running large numbers of jobs where I try to limit the number of jobs so as not to exceed the available RAM of the machine. Occasionally I mis-estimate how much memory some of the jobs will take, and the machine starts thrashing the swap file. I resolve this…

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Utility to record IO statistics (random/sequential, block sizes, read/write ratio) in Unix

- by Michael Pearson

As part of provisioning our new server (see other SF) I'd like to find out the following: ratio of random to sequential reads & writes amount of data read & written at a time (pref in histogram form) I can already figure out our reads/writes on a per-operation and overall data level using iostat…

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unix grep for a string within all gzip files in all subdirectories

- by matt123

can anyone help me grep for a string recurrsivley thought all .gz files in all directories and subdirectoris Thanks

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Exclude all hidden directories in UNIX find

- by xRickerlx

I'm doing a word search using the following command: find . -exec grep -q [some_word] '{}' \; -print -o -name .svn -prune -o -name .ssh -prune -o -name .boneyard -o -name log -prune -prune -o -name tmp -prune Is it possible to use a regex to exclude all hidden directories? Note: The current command…

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Unix: Search for file contents

- by Svish

I find the find . -name "some-file" command very useful to list all files matching some file name in a folder. Is there anything similar I can use to list all files that contains string? If you needed to find all files in a directory that had a certain string of text in it, what would you use?

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How to Practice Unix Programming in C?

- by danben

After five years of professional Java (and to a lesser extent, Python) programming and slowly feeling my CS education slip away, I decided I wanted to broaden my horizons / general usefulness to the world and do something that feels more (to me) like I really have an influence over the machine. I chose…

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What are the calling conventions for UNIX & Linux on x86-64

- by claws

Explains both (UNIX & Linux) calling conventions: http://www.int80h.org/bsdasm/#system-calls http://www.freebsd.org/doc/en/books/developers-handbook/x86-system-calls.html Can any one please tell me or point me to similar doc for x86-64 on both UNIX & Linux?

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edit files in unix

- by Niklas

Hi, I started to work in unix for couple of weeks ago and can very little about unix. Everytime I edit a file, a temp file~ appears in the filesystem. What does this mean? Can I just remove all these files? What can I do for removing these files automaticaly everytime I close the original file? …

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What are the calling conventions for UNIX & Linux system calls on x86-64

- by claws

Explains both (UNIX & Linux) calling conventions: http://www.int80h.org/bsdasm/#system-calls http://www.freebsd.org/doc/en/books/developers-handbook/x86-system-calls.html Can any one please tell me or point me to similar doc for x86-64 on both UNIX & Linux?

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UNIX timestamp always in GMT?

- by bn

UNIX timestamp always in GMT? I tried to run php function time() and when I tried to convert the unix timestamp from the time() function, the output is not similar to the computer time. Thank You

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Python datetime to Unix timestamp

- by Off Rhoden

I have to create an "Expires" value 5 minutes in the future, but I have to supply it in UNIX Timestamp format. I have this so far, but it seems like a hack. def expires(): '''return a UNIX style timestamp representing 5 minutes from now''' epoch = datetime.datetime(1970, 1, 1) …

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UNIX Executable File

- by iSight

Hi, I got some file sample.mt from client, and when i open info, it reveals as UNIX Executable file. But, actually when i replaced the extension with zip, i could extract the file content. And it appears to be folder. Can any one say what exactly UNIX Executable file means and how is…

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Is there a java library equivalent to `file` command in unix

- by Shervin

Is there any java libraries that is similar to unix's command file? ie: $ file somepicture.png somepicture.png PNG image, 805 x 292, 8-bit/color RGB, non-interlaced The file command is such a nice tool. I need something that can tell me if the file is really what I want it to be. (ie a…

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PHP - Accurate Unix timestamp periods without MySql

- by Wonka

I'm trying to have an accurate Unix timestamp values for: today, this week, this month, this year There are a few snags however: - Today should be everything since last midnight - This week should start on the last/this monday - This month (should know if its 30/31 days or 28/29 days feb)…

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Correct usage of socket_select().

- by Mark Tomlin

What is the correct way to use socket_select within PHP to send and receive data? I have a connection to the server that allows for both TCP & UDP packet connections, I am utilizing both. Within these connections I'm both sending and receiving packets on the same port, but the TCP…

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unix career in programming

- by mnunna

I am currently working on a HP-UX platform and my role as a prod support team member involves mostly to write shell scripts. But I want to branch out into core systems programming in unix. A quick search on the internet threw no "unix systems programming jobs" in my area. I'm confused…

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