Questions tagged [linux]

A family of Unix-like operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.

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118 votes
3 answers
202k views

List files bigger than filesize specified

How can I make ls (or any other command) list only files bigger than a specific file size?
Johnny's user avatar
  • 1,307
118 votes
11 answers
62k views

Linux / OS X tar incompatibility – tarballs created on OS X give errors when untarred in Linux

When I tar up files on my Macbook and untar them in Linux, I repeatedly get the following warnings/errors: tar: Ignoring unknown extended header keyword `SCHILY.ino' tar: Ignoring unknown extended ...
Dave Dopson's user avatar
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118 votes
4 answers
110k views

How to add a command in vim editor?

If suppose my source code file name is "foo.c". While editing and debugging i always execute this command:- :!gcc -g foo.c -o foo;gdb foo Can I add a custom command to Vim such that If i type ":...
Abhijeet Rastogi's user avatar
117 votes
1 answer
64k views

Why are there many processes listed under the same title in htop?

Can anyone explain to me why there are sometimes 10 or 15 processes with the same title and "stats" listed in htop? I'm guessing there are multiple threads running - but that many of them obviously ...
javanix's user avatar
  • 1,179
116 votes
13 answers
306k views

How to create a video from images using FFmpeg?

Is it possible to use ffmpeg to create a video from a set of sequences, where the number does not start from zero? For example, I have some images [test_100.jpg, test_101.jpg, test_102.jpg, ..., ...
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116 votes
6 answers
61k views

How to: Unlimited Bash/shell history?

Is there a way to define an unlimited history in Bash ?
Dragos's user avatar
  • 1,497
116 votes
2 answers
275k views

What is $* and $# in Linux?

What do the following environment variables in Linux mean? What is $* (dollar sign followed by an asterisk)? What is $# (dollar sign next to a hash mark/number sign/octothorpe/pound sign)?
raghavayc's user avatar
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115 votes
3 answers
638k views

How to upload local file to server through Linux terminal

I am trying to upload local files to server by using Putty or SSH but not getting upload there. Is there any direct method to upload file from local to server from Linux terminal without using FTP ...
Sanjeev Kumar Goswami's user avatar
115 votes
5 answers
168k views

Check if any of the parameters to a bash script match a string

I'm trying to write a script where I want to check if any of the parameters passed to a bash script match a string. The way I have it setup right now is if [ "$3" != "-disCopperBld" -a "$4" != "-...
iman453's user avatar
  • 1,495
115 votes
1 answer
129k views

Remove single file from zip archive on Linux

I have a zip archive (created automatically in a script with -j -r flags) and I would like to remove a single file from it. I tried as documented. zip -d "picture_43_9.jpg" gallery.zip but I get ...
Alex Flo's user avatar
  • 1,341
115 votes
4 answers
153k views

How to copy symlinks to target as normal folders

i have a folder with symlinks: marek@marek$ ls -al /usr/share/solr/ razem 36 drwxr-xr-x 5 root root 4096 2010-11-30 08:25 . drwxr-xr-x 358 root root 12288 2010-11-26 12:25 .. drwxr-xr-x 3 root ...
user avatar
114 votes
10 answers
308k views

Play MP3 or WAV file via the Linux command line

I would like to make an alarm system backed by a Ubuntu (no graphical interface) box, which plays various announcement and alarm audio tracks (.mp3 or .wav) via the command line. For example: $ root&...
c2h2's user avatar
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110 votes
9 answers
121k 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 ...
rwallace's user avatar
  • 2,597
110 votes
10 answers
105k views

How can I diff two XML files?

On Linux, how could I generate a diff between two XML files? Ideally, I would like to be able configure it to some things strict, or loosen some things, like whitespace, or attribute order. I'll ...
qedi's user avatar
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110 votes
7 answers
240k views

How to remove a symbolic link to a directory?

I am using Ubuntu 8.10, Bash and I made a symbolic link with the following command: ln -s ../test5 I want to remove it now but my rm fails: rm -Rf test5/ rm: cannot remove `test5/`: Not a directory ...
Peter Smit's user avatar
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110 votes
2 answers
124k views

How can I use tar command to group files without compression?

I have a very large folder of 120,000+ files. and I need to move them to another location on my same machine (same partition). I'd like to use the tar command to group them up as a single unit and ...
sergserg's user avatar
  • 1,294
109 votes
6 answers
320k views

OpenSSL missing during ./configure. How to fix?

I was trying to install node.js and found OpenSSL support missing during ./configure. How can I fix it? Is it a mandatory step? Would the --without-ssl option fix the problem? # ./configure ...
P K's user avatar
  • 2,203
109 votes
6 answers
39k views

When must I use #!/bin/bash and when #!/bin/sh?

When is #!/bin/bash more appropriate than #!/bin/sh in a shell script?
Hendré's user avatar
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109 votes
5 answers
97k views

How do I create a relative symbolic link in Linux?

I need a symlink that resolves relative to the directory it is placed in. What command is used to create such a thing?
Jeremiah Rose's user avatar
109 votes
10 answers
400k views

How to access a BitLocker-encrypted drive in Linux?

I have a laptop running Windows 7 Ultimate. I have encrypted my drives using BitLocker. Now I have also installed Lubuntu along with Windows. But my encrypted drives are not visible in Linux. How ...
Suyash Mohan's user avatar
  • 1,295
109 votes
14 answers
126k views

faster way to mount a remote file system than sshfs?

I have been using sshfs to work remotely, but it is really slow and annoying, particularly when I use eclipse on it. Is there any faster way to mount the remote file system locally? My no.1 priority ...
CuriousMind's user avatar
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108 votes
9 answers
186k views

Opening a .msg file in Ubuntu [closed]

Someone sent me a .msg file on Skype, and somehow I just can't open this in Ubuntu. Is there any app in which I could open the .msg file?
Elitmiar's user avatar
  • 3,144
107 votes
5 answers
307k views

Where is the temporary directory in Linux?

Does Linux have a standard temporary directory for general use, like Windows's C:\Temp folder? If so, where is it located? I found an SO question about finding a tmp directory programmatically, but I ...
Pops's user avatar
  • 8,473
106 votes
4 answers
479k views

Checking what PHP version I'm running on Linux?

I'm running Centos 5 and I need to know what version of PHP I'm running, is there a command for this which I can run?
Elitmiar's user avatar
  • 3,144
105 votes
4 answers
65k views

Convert a PDF to greyscale on the command line in FLOSS?

I have a colour PDF file, and I'm going to print it out and then photocopy it in black and white. I'd like to know what it's like in B&W before photocopying it. Is it possible to 'greyscale' a PDF ...
Amandasaurus's user avatar
  • 1,977
105 votes
4 answers
468k views

How can I clear the IP address of Ethernet interface without cycling the interface up/down or restarting it

What is the Linux command to clear IP addresses of an interface without bringing it down and/or restarting network services? Seems strange that ifconfig is able to change IP addresses but has no ...
jackhab's user avatar
  • 2,970
105 votes
10 answers
114k views

How to join/merge many mp3 files?

Searching Google on how to join/merge many mp3 files, it suggests that I should just cat them together. That might "work", but clearly it is not the correct way to do it, as each header and set of ...
Sandra's user avatar
  • 2,643
105 votes
4 answers
89k views

Getting WGET to display a less verbose output

Is it possible to get WGET to only show download progress e.g. download bar, opposed to all of the connection info, as it does look a little ugly on the client side, is this possible to do?
Jay's user avatar
  • 1,051
104 votes
11 answers
303k views

What is the Linux command to find out hardware info?

I need to find out hardware information for the below items under Linux: CPU (and cores) CPU speed Memory Hard disks OS version Any advice?
user avatar
104 votes
3 answers
54k views

What exactly is <() in bash (and =() in zsh)?

I'm pretty comfortable with bash, but recently I ended up in a substitution I didn't know. What exactly is <(command) in bash? How does it compare to the =(command) in zsh? I understand that this ...
Henrique Barcelos's user avatar
104 votes
9 answers
62k views

What is the equivalent of Linux's "~" (tilde) in Windows?

In Linux, we can go to the user home by entering the tilde (~) character after cd: cd ~ How to do the same in Windows? Each time, I need to type: cd C:\Document and Settings\freewind That's too ...
Freewind's user avatar
  • 1,897
104 votes
7 answers
79k views

What happens if mv is interrupted?

What happens if the Linux mv command is interrupted? Say, I'm moving a whole directory to some other place and interrupt it while it's moving. Will the source directory still be untouched?
dehmann's user avatar
  • 2,293
104 votes
8 answers
122k views

How can I find the oldest file in a directory tree

I'm looking for a shell one-liner to find the oldest file in a directory tree.
Marius Gedminas's user avatar
103 votes
5 answers
97k views

push/pop current directory?

With bash is there a way to push and pop the current working directory? I tried writing bash;cd dir; ./dostuff;exit; but the current directory is now dir.
user avatar
103 votes
2 answers
8k views

Delete entered password in hidden password prompt (Linux) with shortcut

Is there a way to delete all characters that I entered in a hidden password prompt in Linux? For example, when I SSH to a server, it asks for my password where the entered keys are not shown: $ ssh ...
bugybunny's user avatar
  • 1,453
102 votes
6 answers
191k views

How to update snap-store linux.. How to update this?

How to update snap-store . I don't have Ubuntu advantage subscription.
Ctf Ctf's user avatar
  • 1,133
102 votes
3 answers
115k views

logrotate configuration file syntax - multiple wildcard entries possible?

Since the man page doesn't answer my question and I don't want to force a rotation cycle, I decided to ask the question here. The man page for logrotate gives the following example: "/var/log/...
0xC0000022L's user avatar
  • 7,033
101 votes
12 answers
172k views

Best way to transfer files over a LAN between two Linux computers

I want to transfer files (a music folder) between two Linux computers. After searching for the best way to do this, I've seen that there are lots of ways of doing this. I know this has been asked a ...
jonallard's user avatar
  • 1,356
101 votes
5 answers
380k views

How to update Google chrome in Ubuntu?

How to update Google chrome in Ubuntu?
OscarRyz's user avatar
  • 4,131
101 votes
8 answers
184k views

How can I view results of my cron jobs?

I see so many guides on how to run crontab, but what I need right now is to learn how to Find log files about cron jobs Configure what gets logged
Zombies's user avatar
  • 3,812
100 votes
3 answers
78k views

Case Insensitive search from find command?

I am not able to figure out how can I do case-insensitive search using the find command. I tried find . -name -i pattern And it does not work.
Vikash Jindal's user avatar
98 votes
3 answers
293k views

Give write permissions to multiple users on a folder in Ubuntu

There is a folder that is owned by user tomcat6: drwxr-xr-x 2 tomcat6 tomcat6 69632 2011-05-06 03:43 document I want to allow another user (ruser) write permissions on document folder. The two users ...
TheVillageIdiot's user avatar
97 votes
6 answers
187k views

how to download dropbox files using wget command?

Seems I can only download dropbox files using explorer such as chrome and firefox. If I use wget to download, then I would get a file which is in html format. Why? For example you can open this link ...
hugemeow's user avatar
  • 2,299
97 votes
18 answers
196k views

Linux "Top" command for Windows Powershell?

I am looking for a PowerShell cmdlet that can provide similar functionality to the Linux Top app. Something that refreshes at some given interval and displays the process list with CPU % util. I have ...
user avatar
97 votes
2 answers
173k views

How do I clear out the ssh-agent entries (on Mac OS X )?

I'm running Mac OS X, and it appears that after SSHing to several machines, using identity files, my 'ssh-agent' builds up a lot of identity / keys and then sometimes offers too many to a ...
cwd's user avatar
  • 18.1k
97 votes
8 answers
125k views

How can I recursively copy files by file extension, preserving directory structure?

At the Linux command line, I'd like to copy a (very large) set of .txt files from one directory (and its subdirectories) to another. I need the directory structure to stay intact, and I need to ...
unclaimedbaggage's user avatar
97 votes
5 answers
55k views

Aptitude vs. apt-get: Which is the recommended (aka the "right") tool to use?

Some time ago I read that aptitude is the preferred tool for installation on Debian-based systems. But when you search around on how to administer a Debian-based system, then aptitude is rarely ...
Vokuhila-Oliba's user avatar
96 votes
16 answers
129k views

How to start GUI linux programs from the command line, but separate from the command line?

I've searched for this before, but have never been able to find an answer. In Windows, if I have a console window open, type winmine, and press enter, Minesweeper will appear, completely separate ...
Jason's user avatar
  • 1,069
96 votes
2 answers
220k views

How can I filter out unique results from grep output?

In linux, I can grep a string from a file using grep mySearchString myFile.txt. How can I only get the result which are unique?
hap497's user avatar
  • 2,959
96 votes
5 answers
405k views

How to chown/chmod all files in current directory?

I am trying to change the ownership and permissions of some files (and directories) in the current directory. I tried this: chown username:groupname . ...expecting that it would affect all the files ...
Andrew's user avatar
  • 14.9k