One or a set of directives issued in the *nix environment to get information, change the state of something or to execute something. In other words: To gain an objective.

learn more… | top users | synonyms

0
votes
1answer
14 views

run remote command to save debian package list

I'd like to backup the package list(dpkg) of some remote computers to a backup server: all of them running Debian. I already configured the rsa key to login remotely as root on the other computers ...
0
votes
4answers
52 views

Remove first 2 columns from first row of a file

I am looking for a command to remove first 2 columns from the first row of a file. The delimiter for the columns is a pipe. Number of columns vary. we just need to blindly remove first 2 columns. ...
1
vote
3answers
67 views

List of files where the line count is greater than 2

Bunch of files exist in a directory. Some files have 1 line in it, some files have more number of lines. I'm trying to display filenames from a particular directory(with full path), where the ...
-1
votes
0answers
15 views

Command to check package version in Sles

What is the command to check package version in Sles OS?
0
votes
0answers
23 views

Failed to execute the iscsiadm commands

When I am using the command: iscsiadm -m discoverydb -t st -p 10.10.11.12:3260 -I be2iscsi.00:17:a4:7a:e3:34.ipv4.0 --discover -P 1 I am getting below error: scsi host1: BC_207 : MBX Cmd Failed ...
2
votes
1answer
26 views

Failed in execute of “lsscsi” command [closed]

I can't execute the "lsscsi" command in linux, I keep getting "command not found" when I try to run it. How can I solve this issue?
0
votes
3answers
138 views

Can a command be executed without a shell?

I am developing a binary executable program command to execute programs and return the output into a text field. The parameters to the command involve the command itself as it would be typed on the ...
0
votes
0answers
37 views

How to manage any command access privileges on debian linux

I am using Debian 7, and my desktop is xfce. I want to achieve managing any command on Linux. For example, executing /usr/bin/xfce4-taskmanager command would not require sudo privileges so any user ...
5
votes
2answers
95 views

Converting ext2 to ext4

I have a file-server with three disk's that are ext2 file-systems, is it possible to change/convert these to ext4 which have much improved characteristics, while data is on the disk's and without ...
4
votes
1answer
175 views

ZIP files with size limit

Is there a command to create multiple ZIP files based on file size? So that in a folder of 600 files, totalling 1 GB, the command will create 4 zips roughly equal to 250mb. There's a similar command ...
2
votes
1answer
33 views

External command to force ofstream to flush

I have a C++ ofstream that, for performance reasons, I don't flush from inside the code. However, occasionally I need to inspect the file contents. Is there a Linux command that will force the ...
3
votes
3answers
52 views

When to use XPG* version of a command?

I occasionally do work on an older Solaris machine whose default version of grep is non-POSIX-compliant. This causes problems in my rc files because the default grep on the machine doesn't support ...
0
votes
0answers
20 views

Sed replace with command output [duplicate]

I'm trying to replace text with the contents of a file and I'm getting errors. This works: cat /tmp/test | sed -e "s/__TEST__/$(cat pass)/g" But this one doesn't cat /tmp/test | sed -e ...
1
vote
5answers
64 views

Difference between 'ls -ltr abc*' and 'find ./ -name abc*' command? [duplicate]

To search a file in a directory, I found two commands as below: ls -ltr initialfilename* find ./ -name initialfilename* Sometime, first command gives me the search result but sometime I used to ...
3
votes
2answers
143 views

How to check if vim is installed?

I want to know how to check whether a command is installed. Specifically, I want to alias vi to vim on all machines where vim is a valid command. And I want to keep my *rc files generic. But some ...
0
votes
0answers
17 views

How to find last x minute internet usage

How can i find out the last X minute download bandwidth in megabyte? i want to use it within a bash script.
0
votes
3answers
41 views

What is meaning of {} + in the exec command?

I want to know the meaning of {} + in the exec command, and what is the difference between {} + and {} \;. To be exact, what is the difference between these two: find . -type f -exec chmod 775 {} + ...
0
votes
0answers
12 views

What shell extension recommends packages if command is not found and how to update it? [duplicate]

I know this question might sound a little strange but i really don't know how to describe it better. On my Debian system I have a shell extension for bash that, whenever I enter an unknown command, ...
0
votes
0answers
22 views

Recover a folder just delete [duplicate]

I just delete (was my error) a folder my_folder by doing $ rm -R my_folder, how can I recover it?
0
votes
0answers
9 views

Verify par2 on different media?

Is there an easy way to point to a par2 index file in one place and have it use a different base directory for the files to verify? Here's what I'm up to: I copy a bunch of stuff to backup media. ...
1
vote
1answer
196 views

lsof: no pwd entry for UID

I'm trying to run command lsof |grep services on my Solaris 10 to find any processes that have big files which are using up the disk space but i got a bunch of lines saying: lsof: no pwd entry for ...
11
votes
2answers
853 views

What is DISPLAY=:0?

What is DISPLAY=:0 and what does it mean? It isn't a command, is it? (gnome-panel is a command.) DISPLAY=:0 gnome-panel
4
votes
3answers
178 views

Get last part of string after hyphen

Is there a simple command line to extract the last part of a string separated by hyphens? E.g., I want to extract 123 from foo-bar-123.
-3
votes
1answer
269 views

does curl -Ls 'http://pastebin.com/raw.php?i=r2jYDZaw' mean it will not output anything?

Does the s in -Ls mean that nothing should be outputted? If so what will be the output then?
0
votes
0answers
15 views

using man command for a system call close [duplicate]

So if we have an executable program called close on linux, and theres also a system call close. How can i generate a command that makes sure i get the manual for the system call "close" rather than ...
1
vote
3answers
109 views

What is the reason for having numbers within the brackets of a function ? [duplicate]

I have seen on many occasions a name of a function (frankly speaking I just call it function because of it typical appearance, they are though sometimes named commands or system calls but I do not ...
0
votes
2answers
46 views

Create own launch command in Fedora

How can I set alias for gnome-calculator so I can launch it just by typing calc. And how can I create my own command for my own application? I need it to work in this command prompt: I know that in ...
1
vote
1answer
23 views

Sort packages by size one-liner as function

While surfing web I've discovered nice one-liner that suits my needs well expac -s "%-30n %m" | sort -hk 2 | awk '{print $1, $2/1024/1024}' | column -t| However all the functional needed I got used ...
1
vote
1answer
24 views

Command to get the id-port no: - & last three strings?

Can someone please help me with the one liner command to get the blocked and italicized only from running something like...ps -ef | grep java | cut -d: -f20- | cut -d ' ' -f20 | Desired Result ...
1
vote
0answers
35 views

Automatically Rename File if there's a Duplicate Filename

I have a command that creates montages of images. Sometimes I want to save multiple montages from a series of images in a folder. The montage will be saved as output.jpg. But if I create another ...
4
votes
5answers
292 views

Showing all pages at once with man command [duplicate]

Say if I run the command man who, I have to keep pressing space or enter to show all content. Is there a way to show all of the content at once?
1
vote
2answers
47 views

I changed my PATH and now for every command it returns “command not found” [closed]

I am on MacOSX, using the iTerm and I'm very new at all of this. I am trying to prepare for installing bioinformatics programs, so I made new directories for "Scripts" and "Programs" and wanted to add ...
1
vote
2answers
189 views

What is difference between pbrun and sudo command?

What is difference between pbrun and sudo command? I have seen people executing pbrun sudo su - what this means? I know su -, it will try to switch to root user. What speciality pbrun gives to sudo ...
1
vote
1answer
44 views

How to switch user with pre-configured credentials in SSH Terminal after logging in as standard user

I was wondering how to execute a command file where: After logging in as a standard user, I want to switch user to "username" with password being "password", I can successfully execute the command.txt ...
3
votes
3answers
66 views

how to remove accidentally created '~' and '..'

I'm using wget to download some webpages and I used the -P option without knowing that it wouldn't expend .. or ~. So I found I've created them after running the program. Now the problem is, how do I ...
1
vote
0answers
14 views

Combine multiple PSCP commands?

I need to transfer multiple folders from my server to my pc. I'm currently using a command like: pscp -r user@ServerIP:/public_html/folderA "C:\folderA" && pscp -r ...
0
votes
1answer
151 views

What does the option -C achieve in ls output?

In the man pages it says: -C list entries by columns However, I really cannot notice any difference between the output of ls or ls -C, could someone explain this to me?
0
votes
1answer
337 views

command to clean up old log files

I was trying to automate some auto cleaning of my Ubuntu System, with Cron Jobs I tryed to simplify this: sudo find /var/log -type f -name "*.1.gz" -delete sudo find /var/log -type f -name "*.2.gz" ...
0
votes
2answers
66 views

How can I open a man page in a new terminal window?

I'm wondering if anyone can help me with a workflow issue. I sometimes open up a man page for a command, take note of several command options and parameters, go back to the command line and then input ...
1
vote
1answer
31 views

Snapshotting a Linux container in Debian

I know that the command $ lxc-snapshot exists somewhere, but it seems that it's not available on Debian? Forgive my Linux ignorance - but how do I get a hold of this capability? Is there an ...
0
votes
1answer
54 views

linux + top command

I run the top command on my linux machine and I see that vim command take like 99.5% CPU PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ...
1
vote
3answers
431 views

Execute command in another terminal and closing it without killing command

For closing terminal without killing script/command we use & operator at last while calling command. Like: gedit & Here I used gedit as an example command Same thing I want to do on ...
1
vote
1answer
22 views

why jobs doesn't list commands from script

I have a script that runs some programs in the background, but after running it, they are not listed by the command 'jobs'. Why is this? (./m_prog -t m_prog1 m_config) & (./m_prog -t m_prog2 ...
1
vote
1answer
154 views

What does this `xhost …` command do?

Please help me understand this line of command: xhost +SI:localuser:lightdm in reference to the answer in this post and also suggest if there's a better way and why that's needed. I couldn't make ...
0
votes
1answer
37 views

Extract audio from video in Thunar custom actions

Thunar custom actions can be used to convert media files by adding a simple command like avconv -i %f %f.mp3 I would like a command to extract aac sound from mp4 and flv files with a Thunar custom ...
0
votes
1answer
101 views

Command not working anymore in Thunar custom actions

I used to create a Thunar custom action as presented here in order to extract audio without transcoding from selected (multiple) video files . The command to be added in Thunar custom actions list ...
2
votes
2answers
609 views

How to permanently enable scl CentOS 6.4?

I installed a newer version of devtoolset (1.1) and was wondering how I would go about permanently setting these to be default. Right now, when I ssh into my server running CentOS, I have to run this ...
-4
votes
1answer
42 views

What is “jobs” commmand in Redhat Linux [closed]

What is jobs command in Linux and how to use it? Please give some example.
0
votes
0answers
35 views

Is there a large performance difference between find and find2perl

Is there a performance difference between find and find2perl? I work for a hosting company and I was told that our admins prefer us to use find2perl over find. Supposedly this is because find is ...
1
vote
2answers
220 views

Read Command : How to verify user has typed something

I am a beginner in Bash so please bear with me. I'm trying to create an if else statement to verify that the user has entered something. If they have it should run through the commands, and if not i ...