The command tag has no wiki summary.
8
votes
2answers
157 views
how to get exit status from the command before the last
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 ...
0
votes
2answers
60 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 ...
0
votes
1answer
31 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
66 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
81 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 ...
3
votes
1answer
90 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 ...
9
votes
2answers
416 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
37 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 ...
1
vote
2answers
102 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
133 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
67 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
84 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
76 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
3answers
136 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 ...
14
votes
2answers
554 views
How to stop the find command after first match?
Is there a way to make the find command to stop right after finding the first match?
-4
votes
1answer
101 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 ...
5
votes
2answers
188 views
Which of these three commands is telling the TRUE Redhat release information
I was checking for the Redhat release so this time I used three different commands. Two commands gave the same result but the third command gave different result. Which one is right.
...
4
votes
1answer
194 views
What does <defunct> mean in the output of ps?
I had issued the ps -ef|grep java command and this is one of the entries that I got :
subhrcho 875 803 0 Jan23 pts/5 00:02:27 [java] <defunct>
What is <defunct> implying here ? ...
3
votes
2answers
138 views
Please explain the -f option in pgrep
man pgrep says the following about -f option:
-f The pattern is normally only matched against the process name.
When -f is set, the full command line is used.
What does it ...
3
votes
1answer
127 views
What is the difference between exiting a process via Ctrl+C vs issuing a kill -9 command?
I know I can kill any process with kill -9 command . But sometimes i see that even if I have terminated a program with CTRL+C , the process doesn't get killed . So I want to know the difference ...
-3
votes
2answers
312 views
Please explain this output of ps -ef command?
A part of the output from the ps -ef command is given below :
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 2012 ? 00:00:01 init [3]
root 2 ...
0
votes
3answers
220 views
What is the difference between ps and top command?
What is the difference between ps and top command ? I see that both can display information about running processes . Which one should be used when ?
10
votes
4answers
534 views
What is the difference between running a executable just by name and by appending a dot /slash before it?
This is the output from ls -all command :
-rwxr----- 1 subhrcho dba 3600 Nov 13 17:26 jdev
-rw-r----- 1 subhrcho dba 1566 Nov 13 17:26 jdev-Darwin.conf
-rw-r----- 1 subhrcho dba 347 Mar 6 2009 ...
0
votes
1answer
63 views
Please explain the output from the jobs command
When I ran jobs command I see the following output :
[1] - Suspended ./startWebLogic.sh
[2] + Suspended (signal) top
What does -/+ indicate in the second column ?
...
1
vote
2answers
148 views
explain the command `printf — “#!${opt_E}”`
I am not able to understand this command and getting confused :
here are things i executed on linux trying to undertand its working
[root@testgfs2 final_scripts]# printf -- "#!${opt_E}"
printf -- ...
3
votes
2answers
90 views
Make copies of a single directory to multiple directories with different names
I'm trying to replicate a single directory (with sub-directories) to a bunch of new directories based on a list. For example I can:
mkdir Fred Barney Thelma Louise Foo Bar
How would I copy a premade ...
3
votes
1answer
189 views
What is the use of literal command in ftp?
Browsing through FTP help (i.e. ftp> ?), showed me a command name literal, description of which is
ftp> ? literal
literal Send arbitrary ftp command
I tried to do some trial and ...
6
votes
3answers
378 views
Difference between commands in bash script and commands in terminal
Are there any differences between commands that you type into the terminal and commands you include in a script?
5
votes
2answers
114 views
Why is cd not a file in /bin? [duplicate]
Possible Duplicate:
Why is cd not a program?
I noticed that every other commonly used util, like ls, cp, rm, etc. are actually files in /bin -- but cd is not. Nor is it in any other ...
3
votes
3answers
37 views
unix command to print till 3rd occurence of “/” in each line
I have one file contains data as follows...
/tutordashboard/manageTutorLogInStatus/?ua=TQ-AUTOCLOSE-REENTER&filterId=089089087087080&dt=1325757272
...
17
votes
2answers
438 views
What is `--` called?
Recently I got to know of -- that is double-hyphen which is used to tell a command that the option list has ended and what follows should not be considered as a option. So,
grep -- 'search_word' *
...
1
vote
1answer
97 views
What does - mean with association to Linux files and directories [duplicate]
Possible Duplicate:
What does “--” (double-dash) mean?
What does '--' (two dashes) mean with association to Linux files and directories.
I've found something else but not too sure if it is ...
3
votes
0answers
30 views
gnu screen: automatic session on split
Inactive region appears after 'split' command in gnu screen now. You must go to the new region and type :screen. Only after that shell session appears in this region.
Is it possible to make new ...
2
votes
2answers
185 views
Difference of folders and files
I have two folders which have different folders inside. Those folders also contains different files. I am looking for the command that would give me the difference between those two parent folders. ...
1
vote
2answers
1k views
tar: Unexpected EOF in archive
I am trying extract .tar.gz file it but with no luck
gzip: stdin: unexpected end of file
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
the ...
4
votes
2answers
300 views
Why doesn't ln -s tell that it fails when creating a symlink to an existing symlinked directory?
When running (on linux different ubuntu variations):
>ln -s dir_1 symlink_dir
>ln -s dir_2 symlink_dir
It fails without telling that it fails. But if you do the same thing on a file instead ...
0
votes
1answer
115 views
Command not found
I am trying to stop a syslog using chkconfig but bash says that command is not available. But when I do
man chkconfig
it opens man page.
This is the command i'm trying to execute.
...
4
votes
3answers
196 views
Test command in unix doesn't print an output
When I type this in the terminal
test 4 -lt 6
I don't get any output. Why not? I need that 0 or 1
3
votes
2answers
460 views
What's the difference between “dir” and “ls”?
I have compared the man pages of dir and ls and they seem to be exactly the same. Both are part of GNU coreutils and "list directory contents".
The only difference I've seen so far is that dir ...
17
votes
2answers
477 views
What is the point of the `cd` external command?
As referenced in this fine answer, POSIX systems have an external binary cd in addition to the shell builtin. On OS X 10.8 it's /usr/bin/cd. You can't use it like the builtin cd since it exits ...
4
votes
6answers
426 views
How to move all files and folders via mv command
How can I move all files and folders from one directory to another via mv command?
4
votes
1answer
248 views
Command & binary exists but cannot be executed
I transfered /etc/* files from one Linux server to another and now I have a strange error. Both are Debian Squeeze.
When I run a command, e.g. ssh, I get an error:
bash: /usr/bin/ssh: No such file ...
2
votes
1answer
200 views
Computer speed in flops
Nowdays, The speed of supercomputers are measured in Flops. Is there any linux command or tool that can calculate or gives the speed of a processor in Flops. If not, than how do we measure it.
1
vote
2answers
369 views
Where to find the source code for ps?
I want to check out the source code for commands such as ps. It seems to be impossible to search LXR (linux.no) for "ps". Where do I find it?
3
votes
3answers
540 views
Split command output by linebreak?
I have a command returning multiple lines. For further processing I need to process each single line of those lines.
My current code works by modifying the IFS (Internal Field Separator):
...
6
votes
1answer
425 views
The “yes” command
There is a yes command in unix/linux which basically infinitely prints y to the stdout. What is the point of it, and how is it useful?
3
votes
4answers
229 views
Is there a practical use for the GNU factor command?
Looking through the GNU Coreutils, I spotted the factor command, that I had never noticed before.
Reading the man page:
Print the prime factors of each specified integer NUMBER. If none
are ...
7
votes
2answers
2k views
How to run time on multiple commands AND write the time output to file?
I want to run time command to measure time of several commands.
What I want to do is:
Measure the time of running of all of them added together
Write the time output to a file
Write the STDERR from ...
2
votes
1answer
251 views
Git auto-complete
I am using Git as many of you do. Also, I don't use any GUI for that — just CLI. So I was wondering: are there any way to make Git commands (git status, git checkout etc.) complete themselves when ...
3
votes
1answer
330 views
How to check will my computer is going to reboot(or shutting down)?
When I send a reboot command(or shutdown) command to a Linux machine does it keeps that messages at somewhere and can I query it. I.e. I will send a reboot command and after that I will run another ...
