Most Popular
1500 questions
104
votes
7 answers
how to glob every hidden file except current and parent directory
I want to glob every hidden file and directory, but not the current (.) and parent directory (..).
I am using bash.
Observe current behaviour:
$ ls -a
. .. ...a ...aa ..a ..aa .a .aa .aaa a
$ echo *
a
$ echo .*
. .. ...a ...aa ..a ..aa .a…
Lesmana
- 26,889
- 20
- 81
- 86
103
votes
8 answers
How to install apt-get or YUM on Mac OS X
I want to use either of apt-get or yum.
How to install them and make them successful running?
Karan-41317
- 1,141
- 2
- 8
- 5
103
votes
10 answers
Does cd . have use?
One of the tutorials I've been following briefly stated that cd . has no use. When trying to replicate issue shown by OP in Symbolic link recursion - what makes it “reset”?, I also tried cd ., which showed the same effect OP described (growing $PWD…
Sergiy Kolodyazhnyy
- 16,187
- 11
- 53
- 104
103
votes
6 answers
A list of available D-Bus services
Is there such a thing as list of available D-Bus services?
I've stumbled upon a few, like those provided by NetworkManager, Rhythmbox, Skype, HAL.
I wonder if I can find a rather complete list of provided services/interfaces.
madfriend
- 1,133
- 2
- 8
- 5
103
votes
4 answers
How can swapoff be that slow?
Somehow I happened to swap out 14 GB of memory. After having killed the culprit, I have tons of free memory again, so I thought I could bring in the important data again. So with 5 GB out of 32 GB used and 14 GB of swap space used, I ran swapoff…
maaartinus
- 4,979
- 7
- 30
- 29
103
votes
7 answers
ssh unable to negotiate - no matching key exchange method found
I am trying to log in to my DSL router, because I'm having trouble with command-line mail. I'm hoping to be able to reconfigure the router.
When I give the ssh command, this is what happens:
$ ssh [email protected]
Unable to negotiate with…
j0h
- 3,467
- 8
- 27
- 36
103
votes
7 answers
Does rsync verify files copied between two local drives?
I want to make a fresh new copy of a large number of files from one local drive to another.
I've read that rsync does a checksum comparison of files when sending them to a remote machine over a network.
Will rsync make the comparison when copying…
Frez
- 1,133
- 2
- 8
- 5
103
votes
5 answers
Systemd Restart=always is not honored
Note: I wrote an article on Medium that explains how to create a service, and how to avoid this particular issue: Creating a Linux service with systemd.
Original question:
I'm using systemd to keep a worker script working at all…
BenMorel
- 4,447
- 8
- 36
- 46
103
votes
4 answers
Command to list PostgreSQL user accounts?
There are createuser & dropuser commands:
createuser - define a new PostgreSQL user account
dropuser - remove a PostgreSQL user account
Is there a corresponding way to list the user accounts?
These two commands do not require the user to invoke…
CW Holeman II
- 3,654
- 5
- 31
- 49
103
votes
4 answers
Why is `while IFS= read` used so often, instead of `IFS=; while read..`?
It seems that normal practice would put the setting of IFS outside the while loop in order to not repeat setting it for each iteration... Is this just a habitual "monkey see, monkey do" style, as it has been for this monkey until I read man read, or…
Peter.O
- 32,426
- 28
- 115
- 163
103
votes
3 answers
What are "session leaders" in `ps`?
What are session leaders, as in ps -d which selects all processes except session leaders?
its_me
- 13,709
- 23
- 54
- 52
103
votes
3 answers
grep inside less?
I'm currently sifting through a lot of unfamiliar logs looking for some issues. The first file I look at is Events.log, and I get at least three pages in less which appear to display the same event at different times – an event that appears to be…
forquare
- 3,396
- 5
- 21
- 32
103
votes
4 answers
How to undo `set -x`?
I typed set -x in terminal.
Now the terminal keeps printing the last command run on top of my output so the command
~]$echo "this is what I see"
returns
+ echo 'this is what I see'
this is what I see
There is no man page for set, how do I turn…
lonewarrior556
- 2,033
- 4
- 16
- 13
103
votes
3 answers
What are pid and lock files for?
I often see that programs specify pid and lock files. And I'm not quite sure what they do.
For example, when compiling nginx:
--pid-path=/var/run/nginx.pid \
--lock-path=/var/lock/nginx.lock \
Can somebody shed some light on this one?
Stann
- 2,159
- 5
- 23
- 24
103
votes
6 answers
Using while loop to ssh to multiple servers
I have a file servers.txt, with list of servers:
server1.mydomain.com
server2.mydomain.com
server3.mydomain.com
when I read the file line by line with while and echo each line, all works as expected. All lines are printed.
$ while read HOST ; do…
Martin Vegter
- 69
- 66
- 195
- 326