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Top new questions this week:

Invalid time zone 'UTC'

Listing the available timezones shows 'UTC' $ timedatectl list-timezones UTC Setting it to UTC fails claiming UTC is "invalid". $ timedatectl set-timezone UTC Failed to set time zone: Invalid time ...

ubuntu timezone  
asked by tcurdt 17 votes
answered by Esa Jokinen 21 votes

Total I/O cost of a process

I know that iotop lets me measure the disk bandwidth used by any or all processes in real time. iotop -a measures the accumulated disk bandwidth, which is closer to what I want. However, when the ...

linux io  
asked by user308485 15 votes
answered by Henrik Pingel 17 votes

Checking RAW file sended to network printer

I have a problem with tracking down an issue with printing specific types of reports (invoice) from an ERP system on Xerox network printers. The ERP system use SAP Crystal Reports to generate ...

printer network-printer  
asked by sokar 2 votes
answered by batistuta09 2 votes

Cloning a UDP packet recieved on localhost to another IP

I have a machine A with local ip 192.168.0.199 - I want to clone all udp packets recieved on a local machine and forward to machine A i tried the below in IP tables sudo iptables -A OUTPUT -t nat -p ...

linux networking iptables linux-networking udp  
asked by Kannaj 2 votes
answered by Kannaj 0 votes

Block IPv6 addresses in my .htaccess file but I get 500 Internal Server Error?

I want to block all IP Addresses starting like this 2a01:598:xxx in my .htaccess file on my WordPress website. But everytime I edit my .htaccess file I can't visit my website anymore. I get an ...

.htaccess wordpress ipv6 500-error ip-blocking  
asked by Benjamin S 2 votes
answered by MrWhite 0 votes

zpool status shows drives are defaulted, but they seem okay. Can I add them back?

zpool status is reporting defaulted drives. But they actually appear to be okay. Is it possible to add them back? $ dev/disk# zpool status -v pool: darkpool state: DEGRADED status: One or more ...

storage zfs ubuntu-18.04 zfsonlinux zpool  
asked by Louis 2 votes
answered by ewwhite 2 votes

Create iPXE UEFI bootable image for QEMU/Libvirt with custom next-server and filename

I can create a VM with libvirt/qemu to boot in UEFI mode. I know that it does iPXE by default, but I want to create/modify a iPXE image in order to override filename and next-server properties. How ...

kvm-virtualization pxe-boot libvirt qemu uefi  
asked by djuarez 2 votes

Greatest hits from previous weeks:

How do I tell Git for Windows where to find my private RSA key?

My Git setup runs fine on Linux, but when I try to set things up under Windows (using Git for Windows and TortoiseGit), I don't know where to put my private SSH key (or, better still, how to tell ssh ...

windows ssh git rsa private-key  
asked by binaryorganic 489 votes
answered by Dan McClain 486 votes

What's the command-line utility in Windows to do a reverse DNS look-up?

Is there a built-in command line tool that will do reverse DNS look-ups in Windows? I.e., something like <toolname> w.x.y.z => mycomputername I've tried: nslookup: seems to be forward ...

windows domain-name-system ip command-line-interface reverse-dns  
asked by alastairs 246 votes
answered by Peter 237 votes

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 ...

linux ext3 disk-space-utilization scsi  
asked by initall 113 votes

Windows Server restart / shutdown history

How can I easily see a history of every time my Windows Server has restarted or shutdown and the reason why, including user-initiated, system-initiated, and system crashed? The Windows Event Log is ...

windows-server-2008 windows-server-2008-r2 windows-server-2012 windows-server-2012-r2 windows-event-log  
asked by JohnC 88 votes
answered by JohnC 102 votes

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<??@@ ?CA??qe?U????иh? .Ceh?YVJ?? JJ ?@@.?E<??@@ ...

log-files tcpdump pcap  
asked by Tony 139 votes
answered by Zoredache 130 votes

how to fix "send-mail: Authorization failed 534 5.7.14 "

I am trying to create e-mail alert on ssh root login so I had to install ssmtp and mail utility. Then I configured ssmtp.conf file as follows : # Config file for sSMTP sendmail # The person who gets ...

email sendmail gmail ssmtp  
asked by Connect 54 votes
answered by emgh3i 80 votes

How do I force sync the time on Windows Workstation or Server?

What is the command to sync a Windows workstation or server to its configured time source?

windows time  
asked by Kyle Brandt 84 votes
answered by Seanchán Torpéist 81 votes

Can you answer these questions?

Setting up a local mirror

Specifically for Wheezy, does anyone know if some of the existing mirror scripts still work or can point me in the right direction to start? For example, will Debmirror work with archive.debian.org? ...

debian-wheezy  
asked by Marco Shaw 1 vote
answered by Marco Shaw 0 votes

CSF/LFD: Firewall automatically disabling again and again

I have setup a droplet on Digital Ocean, and installed CentOS Web Panel. After the initial configuration, I've enabled CSF/LFD firewall. But it is automatically disabling, again and again. I have ...

firewall centos7 csf lfd  
asked by Alena 1 vote

Add an existing vm to vagrant global environment

Something happened and I no longer have any vagrant boxes in my global environment. In other words: $ vagrant global-status id name provider state directory ...

vagrant  
asked by adam-m-hanna 1 vote
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