Tagged Questions
4
votes
4answers
204 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 ...
3
votes
1answer
190 views
Searching a file & excluding lines with a specified string
I have a large log file that contains numerous lines of the same entry, lets call it "repeat-info". As an example here is what a portion of the log might look like:
[Timestamp] repeat-info
...
3
votes
2answers
780 views
How to execute one command on all files within a folder
Saying, I have this tree and I want to execute ruby on all scripts within the folder. How could I archive through one line of command.
./
../
rb-script/
sample1.rb
sample2.rb
3
votes
1answer
332 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
2answers
178 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
2answers
102 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 ...
2
votes
3answers
231 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 ...
1
vote
3answers
137 views
how to forbid a command without a permission
I intended to delete all the backup files in a directory, so I was going to type rm *~ in the terminal. Unfortunately, I hit the Enter before hitting the tilde and unhappy things happened. Although, ...
0
votes
2answers
72 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
37 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 !!!
0
votes
1answer
58 views
Why does this compound command report errors when copying directories? [duplicate]
Possible Duplicate:
Why does this compound command report errors when copying directories?
if one executes the following two commands in one line, as follows,
rm -rf dir ; cp -r dir2 ...
-1
votes
1answer
647 views
Check if the command exists in bash
I want to check if a given command exists in bash and I care only about the native commands of the bash and not the scripts written by the user. When I refer to native commands I mean all those ...
