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1500 questions
61
votes
8 answers

Rsync : copying over timestamps only

Currently I have two directories A/ and B/ which are identical in every respect, with the exception of the timestamps. Therefore if I run the command : rsync --dry-run -crvv A/ B/ then all files are marked "uptodate", whereas the command : rsync…
artella
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61
votes
2 answers

How to ignore an error in Powershell and let it continue?

I am trying to see if a process is running on multiple servers and then format it into a table. get-process -ComputerName server1,server2,server3 -name explorer | Select-Object processname,machinename Thats the easy part - When the process does not…
Jake
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61
votes
4 answers

Fastest way to extract tar.gz

Is there anyway to extract a tar.gz file faster than tar -zxvf filenamehere? We have large files, and trying to optimize the operation.
Justin
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61
votes
2 answers

What user do scripts in the cron folders run as? (i.e. cron.daily, cron.hourly, etc)

If I put a script in /etc/cron.daily on CentOS what user will it run as? Do they all run as root or as the owner?
Kyle MacFarlane
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61
votes
8 answers

Why would I need a firewall if my server is well configured?

I admin a handful of cloud-based (VPS) servers for the company I work for. The servers are minimal ubuntu installs that run bits of LAMP stacks / inbound data collection (rsync). The data is large but not personal, financial or anything like that…
Aitch
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61
votes
4 answers

How to use nginx to proxy to a host requiring authentication?

How can I setup an nginx proxy_pass directive that will also include HTTP Basic authentication information sent to the proxy host? This is an example of the URL I need to proxy to: http://username:[email protected]/export?uuid=1234567890 The…
bwizzy
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61
votes
5 answers

What's the difference between 'useradd' and 'adduser'?

What's the difference between useradd and adduser? When/why should I prefer using one or the other?
lindelof
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61
votes
8 answers

Overriding some DNS entries in BIND for internal networks

I have an internal network with a DNS server running BIND, connected to the internet through a single gateway. My domain "example.com" is managed by an external DNS provider. Some of the entries in that domain, say "host1.example.com" and…
Remy Blank
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61
votes
5 answers

How can I set environment variable for just one command in fish shell?

In bash, I can do EDITOR=vim crontab -e. Can I get similar effect in Fish shell?
skalee
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61
votes
3 answers

Mount Remote CIFS/SMB Share as a Folder not a Drive Letter

Is there any way to mount a remote CIFS/SMB/SAMBA share as a folder/directory and not as a drive letter. For example, I want this map: \\Server\ShareName -> C:\Folder\ShareName Instead of the usual map like this: \\Server\ShareName -> Z:\ The…
Anagoge
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60
votes
1 answer

What is the difference between a 'Login' and an 'Interactive' bash shell

What is the difference between a ‘Login’ and an ‘Interactive’ bash shell? I have quoted Wikipedia below but can anybody give a better answer? EDIT: This is a community wiki so maybe rather than voting to close you could provide examples of which…
Gareth
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60
votes
5 answers

How to give username/password to git clone in a script, but not store credentials in .git/config

I am cloning a git repository in a script like this: git clone https://user:[email protected]/name/.git This works, but my username and my password! are now stored in the origin url in .git/config. How can I prevent this, but still do this in a…
Nathan
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60
votes
6 answers

"reboot" or "shutdown -r now": what restart command is safer?

We have in our organization around ~500 RedHat Linux machines. On all the machines we installed applications and services under /etc/init.d, and oracle RAC servers. We intend to perform yum updates on all machines and after that take a reboot. So I…
dandan
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60
votes
14 answers

64-bit TortoiseSVN on Windows 7 says "file or directory is corrupted and unreadable" then runs chkdsk

I'm using 64-bit TortoiseSVN on a 64-bit Windows 7 Professional. Every so often a checkout or update will fail with an error message like the following. Error: Can't move Error: '[...]\\.svn\tmp\entries' Error: to Error: '[...]\\.svn\entries':…
David Alpert
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60
votes
2 answers

What is the ipv6 equivalent of 0.0.0.0/0

When describing IPv4 networks, I can use 0.0.0.0/0 or just 0/0 to specify all networks. What is the equivalent notation for IPv6?
Andrew
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