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.

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2answers
117 views

Using globbing/wildcards when Opening Files from Terminal

I have a folder A. Inside the folder, there are some files a,b,c,d and there is a subfolder, B, containing files e,f,g. Suppose I want to open files a,b,c,d: then I just type xdg-open *. However, ...
6
votes
2answers
423 views

what is the meaning of this sed command: `;/@/{h;s/test/next/g;x;G}`?

sed -e 's/72;/72, next_val = 0x11111111;/;/@/{h;s/test/next/g;x;G}' fmt_vuln.c > fmt_vuln2.c could you tell me about what is the meaning of ;/@/{h;s/test/next/g;x;G}?
14
votes
1answer
536 views

What does yes $(yes yes) do?

Wondering what use the yes command might be, I stumbled upon this comment, and tried to execute yes $(yes yes) From what I understand, this should simply print out an infinite sequence of yes, but ...
4
votes
2answers
1k views

print command instead of echo in linux

I simply can print a message in terminal using linux echo command. prayag@prayag$ echo "prayag works on JVM" prayag works on JVM Can I have the same output with print command. I actually went ...
7
votes
3answers
2k views

Difference between sudo -i and sudo su [duplicate]

I was wondering what the difference is between sudo -i and sudo su?
3
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2answers
10k views

How to list groups with gid in redhat?

I first listed the groups using : groups I added group using groupadd -g 300 oinstall groupadd –g 500 dba and then when I do groups root bin daemon sys adm disk wheel sfcb I am unable to ...
0
votes
1answer
568 views

Unable to execute command in the Linux with an user

Two scenarios here. Sudo rights are given for a particular group. a. A new user is created and is assigned to the group. b. Using this user, when we execute commands via shell script it is unable to ...
1
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1answer
52 views

Linux Red Hat Library Dependencies question

I have to create a script that will download 8 libraries. However, on the server where we have all the libraries, I can only find 2 or 3 of these 8. I believe these 2 or 3 actually depend on other ...
1
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4answers
644 views

How can I force the use of a specific binary when running a script

How can I force a specific binary to be used when executing a bash script? I have a bash script which uses the "php" binary. There are several php versions on my computer. The main php binary, as ...
0
votes
1answer
623 views

Linux Mint XFCE, command to launch menu

What is the command that launches the whisker menu in the Linux Mint xfce edition. For another distribution that used xfce it was xfce4-popup-whisker menu but that doesn't seem to work. I would like ...
0
votes
1answer
37 views

In which way is a commented line active in a program file?

To solve the bug reported here the solution seems to be commenting, not just adding a certain line in a file - as explained here and here. That is - to make that bug disappear in Xfce, a certain line ...
1
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4answers
265 views

List all commands that a shell knows

What can I type at my shell (which happens to be bash) that will list all the commands that are recognized? Also, does this differ by shell? Or do all shells just have a "directory" of commands they ...
0
votes
2answers
875 views

I used the move command and all files disappeared [duplicate]

I was moving all data to another folder and made 1 mistake and run this commmand mv * /* all files have disappeared now. How can I find them? Or are they deleted?
6
votes
3answers
2k views

Difference between 'ifconfig' and 'ip' commands

I read some articles/tutorials on 'ifconfig' command, most of them included a common statement - "ifconfig is deprecated by ip command" and suggested to learn ip command. But none of them ...
1
vote
2answers
2k views

The -cp option to the java command [closed]

java -cp FILE.jar FILE.Main inputfile What does the -cp option mean? For that matter, what a negative sign in front mean? I've searched everywhere and couldn't find the answer.
0
votes
2answers
214 views

What is the Run prompt equivalency in Linux?

In Windows, there is the Run prompt, which you can access with Win+R key. What is the equivalency to this in Linux? Is there even such a thing or is the Terminal the main prompt you would use in ...
2
votes
3answers
774 views

what is “play” command/package available by default in Linux Mint and how to remove it

I'm trying install play framework on Linux Mint and setup its variable: export PATH=$PATH:/relativePath/to/play But command can't run because it's being overlapped by another play command which was ...
1
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1answer
67 views

Using alot MUA with nottoomuch-addresses

I try to use the MUA alot to work with the nottoomuch-addresses.sh script for autocompletion of addresses within alot like described in: ...
4
votes
3answers
1k views

How to find a file with specific permission of a specific user?

How do I get a list of all the files which permission is "read and write" for a specific user. For example, when I go on the desktop of my mac, then right click on file "A", then "get info", then on ...
4
votes
2answers
651 views

Memory usage command with syntax similar to the time command

What command shows the memory usage of a program, i am looking for a command that is simple to use and has similar syntax to the time command. I am trying to find the memory usage of a md5 hashing ...
4
votes
1answer
179 views

What does the command “$()” do in UNIX?

What does the command $() do in UNIX? Could someone explain what is the significance of $ in the below examples; $(echo var=10) and eval $(echo var=10)
0
votes
1answer
983 views

How to run a shell command in a server?

I am fairly familiar with computers and web stuff but this is a bit out of my comfort zone. I have a shell script (.sh file) I want to run in a Linux server I have one site hosted (the script is a ...
1
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1answer
238 views

Execute command supplied by function parameters

I'm trying to create a function method in a bash script that executes a command which is supplied to the method by the paramters. Meaning somethings like this: special_execute() { # Some code ...
12
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5answers
11k views

Delete 100 lines from vi editor using single command

I am using Ubuntu and trying to delete all 100 lines from vi editor but I got interview question of doing this in one command.
0
votes
4answers
11k views

How to create custom commands in Unix/Linux? [closed]

I'm a newbie in Unix/Linux environment. Can anyone guide me to create custom commands in Unix/Linux. Thanks in advance
1
vote
1answer
101 views

Find if a process terminates in a specific amount of time

I am running a program.Inside this program i run a specific command and i use ulimit command to terminate the running of that command if it exceeds an amount of time.To be more clear i run this: ...
1
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1answer
550 views

Bash command that uses wildcard in place of folder to copy folder contents of multiple files into one directory?

I have a directory ~/dir that contains a bunch of random folders like: ~/dir/av 801 and ~/dir/lm 320. I want to copy the contents of every inner folder (ie: av 801) into a different directory. The ...
0
votes
1answer
134 views

How can I see the rate of my wireless card?

I am setting manually the bit-rate of my wireless card ! sudo iwconfig wlan0 rate 54M Where can I see if it is applied, because the command does not give any feedback !!!
4
votes
4answers
716 views

What does <<< mean? [duplicate]

What does <<< mean? Here is an example: $ sed 's/a/b/g' <<< "aaa" bbb Is it something general that works with more Linux commands? It looks like it's feeding the sed program with ...
1
vote
1answer
103 views

Command “I'm” on linux ubuntu [closed]

I'm new at linux, ubuntu, and I did type I'm running and then like if it was a program or something else, I was allowed to write more... nothing else... I just want to know more about this command ...
-1
votes
1answer
114 views

can't view `split` output files with cat [closed]

File a.txt contains: 1 one 2 two 3 three 4 four 5 five 6 six Then the command: split -2 a.txt output_ yields as output three new files output_aa, output_ab, output_ac When I type: cat output_aa I ...
24
votes
3answers
4k views

Why is dmesg called dmesg?

Is there any explanation/history behind the name of the command dmesg (which prints out some kernel messages)?
0
votes
0answers
211 views

I want to use the command 'shutdown -r now' in Lazarus

I want to use the command shutdown -r now in Lazarus, but I don't know how to do it. Any tips or examples that you can give me I would be most grateful.
8
votes
0answers
209 views

how to get exit status from the command before the last [duplicate]

I have solaris machine ( solaris 10 ) please Look on the following simple commands (haconf -makerw | grep -iq "Cluster already writable") # haconf -makerw VCS WARNING V-16-1-10364 Cluster ...
3
votes
5answers
202 views

find which system is transmitting through a particular port

I am using command nc -lu <port no.> to find on given port any data is receiving or not. I am getting data if there is transmission going on (but don't know from where!). Is there any way that ...
0
votes
2answers
512 views

'df' command doesn't list /home directory

In the book I am reading, the output of df command is shown like this: Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda2 15115452 5012392 9949716 34% / /dev/sda5 59631908 ...
1
vote
1answer
222 views

How to find packages only which package name equal to text with aptitude?

When I want to search a package which named 'z', aptitude find packages which contains 'z' in package name same as 'like' in SQL, so aptitude find a lots of packages. How can I search packages which ...
0
votes
3answers
2k views

Find executable files recursively

I have got the directory called Test and a few directories inside it. Both Test and the directories inside it have executable files. I'd like to print them with ls. I'd use this command. ls -l `find ...
1
vote
2answers
275 views

Is it better to pass all files to mv or to run a bunch of mv processes in parallel?

I have three ways of running mv. First: mv /db/dbfile1 /db/dbfile2 /db/dbfile3 /usb_storage/ and second: mv /db/dbfile1 /usb_storage/ & mv /db/dbfile2 /usb_storage/ & mv /db/dbfile3 ...
4
votes
2answers
3k views

How to see the total progress while copying the files

We know that if we give --progress parameter to rsync it will show the progress of files copied. But issue is that is shows the progress for each single file not total or overall progress. So how to ...
12
votes
2answers
643 views

What's the reason for this specific “rm” sequence in the xkcd joke?

Here's part of this xkcd comic strip where the idea is that the author can't write a sort program so he adds code to delete all files system("rm -rf ./"); system("rm -rf ~/*"); system("rm -rf /"); ...
3
votes
1answer
130 views

clear full-screen in script and get the previous prompts after exiting script

Today I was using glance tool in my office to monitor CPU utilization.When I run glance from terminal ,the command clears the screen and after all the work when I quit back to the terminal,the ...
2
votes
3answers
2k views

Why does Firefox refuse to die despite killing it with pkill -9?

I am issuing the following command to kill Firefox on my Red Hat Linux box: [subhrcho@slc04lyo ~]$ pkill -9 -f firefox [subhrcho@slc04lyo ~]$ However, when I try to invoke Firefox through ...
0
votes
2answers
1k views

Why screen is not splitting my GNOME terminal?

I am working in a remote Linux box using VNC.I have a single terminal with lots of tabs opened in my system. How can I split them using the screen utility? Does the screen utility work with already ...
1
vote
2answers
280 views

Best way to call command within a shell function having the same name [duplicate]

I like to encapsulate commands within shell-functions using the same name. But to avoid the shell-function calling itself recursively, I specify the complete path of the command as the following ...
2
votes
1answer
280 views

Equivalent of pick command in linux

OS: Linux Mint 14 Is there an equivalent of the pick command available in Linux? Pick command is the one where for each given argument, it asks yes/no and prints the selection to stdout. This script ...
1
vote
1answer
1k views

What does sourcing a file mean in a shell? [duplicate]

Possible Duplicate: Different ways to execute a shell script What happens when I issue the following command: source devenv.csh How does it differ from running it just as devenv.csh ?
2
votes
4answers
698 views

What are commands to find shell keywords, built in functions and user defined functions?

I was discussing with my friend on how the commands are parsed in the shell, and he told me that bash searches the command in following order List of aliases List of shell keywords List of ...
27
votes
3answers
8k views

How to stop the find command after first match?

Is there a way to force the find command to stop right after finding the first match?
-4
votes
1answer
148 views

help with making the move from Win to Linux [closed]

This will be a looong "question" not because I intend to make it like this but because the more I learn about Linux the more complex it seems to become for me to figure out which Linux distro, and/or ...