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1500 questions
183
votes
10 answers
What is "-bash: !": event not found"
Try executing the following under a bash shell echo "Reboot your instance!"
On my installation:
root@domU-12-31-39-04-11-83:/usr/local/bin# bash --version
GNU bash, version 4.1.5(1)-release (i686-pc-linux-gnu)
Copyright (C) 2009 Free Software…
Maxim Veksler
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- 10
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- 32
183
votes
18 answers
How do you restart php-fpm?
I need to reload my php.ini and there's nothing in the help dialog about restarting it.
Galen
- 1,983
- 2
- 12
- 10
182
votes
31 answers
How do I prevent accidental rm -rf /*?
I just ran rm -rf /* accidentally, but I meant rm -rf ./* (notice the star after the slash).
alias rm='rm -i' and --preserve-root by default didn't save me, so are there any automatic safeguards for this?
I wasn't root and cancelled the command…
Valentin Nemcev
- 2,015
- 2
- 14
- 12
182
votes
12 answers
What does "Warning: untrusted X11 forwarding setup failed: xauth key data not generated" mean when ssh'ing with -X?
When I use ssh -X on my Mac (running OS X 10.6.7) to connect to my Ubuntu (11.04) box, I get the following warning:
Warning: untrusted X11 forwarding
setup failed: xauth key data not
generated Warning: No xauth data;
using fake authentication…
Daryl Spitzer
- 2,996
- 9
- 33
- 40
182
votes
12 answers
Top level domain/domain suffix for private network?
At our office, we have a local area network with a purely internal DNS setup, on which clients all named as whatever.lan. I also have a VMware environment, and on the virtual-machine-only network, I name the virtual machines whatever.vm.
Currently,…
Otto
- 2,051
- 3
- 17
- 11
180
votes
8 answers
Sudo as different user and running screen
Found out today that running screen as a different user that I sudo into won't work!
i.e.
ssh bob@server # ssh into server as bob
sudo su "monitor" -
screen # fails: Cannot open your terminal '/dev/pts/0'
I have a script…
sdot257
- 3,059
- 5
- 30
- 39
179
votes
2 answers
How do you answer yes for yum install automatically
In centos how do you answer yes automatically for yum install so that it is an unassisted install?
DiverseAndRemote.com
- 2,091
- 3
- 16
- 16
178
votes
8 answers
Filename length limits on linux?
Are there any filename or path length limits on Linux?
readonly
- 3,359
- 4
- 26
- 23
178
votes
8 answers
How do I sleep for a millisecond in bash or ksh
sleep is a very popular command and we can start sleep from 1 second:
# wait one second please
sleep 1
but what the alternative if I need to wait only 0.1 second or between 0.1 to 1 second ?
remark: on linux or OS X sleep 0.XXX works fine , but…
yael
- 2,433
- 5
- 31
- 43
178
votes
4 answers
What is the difference between Load Balancer and Reverse Proxy?
I'm not clear about the difference between Load Balancer and Reverse Proxy. They both seems having same behavior: distributing incoming requests to backend servers.
Morgan Cheng
- 2,114
- 2
- 16
- 13
176
votes
5 answers
What's the difference between authorized_keys and authorized_keys2?
Just wanted a quick summary of the differences between them and why there are two?
Jon
- 2,121
- 2
- 13
- 13
175
votes
7 answers
How can I read pcap files in a friendly format?
a simple cat on the pcap file looks terrible:
$cat tcp_dump.pcap
?ò????YVJ?
JJ
?@@.?E
Tony
- 4,213
- 11
- 35
- 29
175
votes
9 answers
Is it possible to detach a process from its terminal? (Or, "I should have used screen!")
Possible Duplicate:
Can I nohup/screen an already-started process?
On Unix (specifically, Linux), I've started a job in a regular ssh->bash session. I'd like to leave work soon, but I now realize that the job is going to take several hours.
If I…
mike
- 3,963
- 11
- 30
- 27
175
votes
18 answers
Disk full, du tells different. How to further investigate?
I have a SCSI disk in a server (hardware Raid 1), 32G, ext3 filesytem. df tells me that the disk is 100% full. If I delete 1G this is correctly shown.
However, if I run a du -h -x / then du tells me that only 12G are used (I use -x because of some…
initall
- 2,325
- 3
- 18
- 19
174
votes
7 answers
What does Virtual memory size in top mean?
I am running top to monitor my server performance and 2 of my java processes show virtual memory of up to 800MB-1GB. Is that a bad thing?
What does virtual memory mean?
And oh btw, I have swap of 1GB and it shows 0% used. So I am confused.
Java…
kapso
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- 7