181 Matching Annotations
- Feb 2020
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unix.stackexchange.com unix.stackexchange.com
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I use this to keep information about processes that were running at any time during last five days. These are 1-min snapshots so something might get lost but I think it is good enough for me. I want to have some data available when I discover there was a peak in resource usage (I use munin for that). I haven't found a better way to keep track of past processes (tried psacct).
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- Jan 2020
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Just remove the 'rb-readline' gem if you are on a linux like system.
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project.cyberpunk.ru project.cyberpunk.ru
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In the Beginning was the Command Line -- Neal Stephenson
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directory.fsf.org directory.fsf.org
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unix.stackexchange.com unix.stackexchange.com
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Alternatively, if you want to modify the binary, try chrpath, which lets you edit the library search path baked in the executable.
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serverfault.com serverfault.com
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/lib/libc.so.6
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- Dec 2019
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unix.stackexchange.com unix.stackexchange.com
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Now using sudo to work around the root account is not only pointless, it's also dangerous: at first glance rsyncuser looks like an ordinary unprivileged account. But as I've already explained, it would be very easy for an attacker to gain full root access if he had already gained rsyncuser access. So essentially, you now have an additional root account that doesn't look like a root account at all, which is not a good thing.
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wiki.archlinux.org wiki.archlinux.org
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It is possible to do a successful file system migration by using rsync as described in this article and updating the fstab and bootloader as described in Migrate installation to new hardware. This essentially provides a way to convert any root file system to another one.
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rsync provides a way to do a copy of all data in a file system while preserving as much information as possible, including the file system metadata. It is a procedure of data cloning on a file system level where source and destination file systems do not need to be of the same type. It can be used for backing up, file system migration or data recovery.
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github.com github.com
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serverfault.com serverfault.com
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I am familiar with using rsync to back up various files from my system but what is the best way to completely restore a machine.
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opensource.com opensource.com
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I run the script daily, early every morning, as a cron job to ensure that I never forget to perform my backups.
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There are many options for performing backups. Most Linux distributions are provided with one or more open source programs specially designed to perform backups. There are many commercial options available as well. But none of those directly met my needs so I decided to use basic Linux tools to do the job.
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CloneZilla works perfectly. It produces small image files, has integrity check and works fast. If you want to use third device as image repository you should choose device-image when creating image of the first disk and then image-device when you restore it to second disk. If you want to use only two disks - you should use device-device mode. Optionally you may want generate new UUIDs, SSH-key (if SSH server installed), and change hostname.
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www.ostechnix.com www.ostechnix.com
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While there are so many tools to backup your systems, I find this method super easy and convenient, at least to me. Also, this method is way better than disk cloning with dd command. Because It doesn’t matter if your hard drive is different size, or use different filesystem.
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www.chkrootkit.org www.chkrootkit.org
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www.howtogeek.com www.howtogeek.com
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provides a peek behind the ‘magic curtain’ at what is going on for a curious reader
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www.linuxfromscratch.org www.linuxfromscratch.org
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Beginner's Guide to Installing from Source http://moi.vonos.net/linux/beginners-installing-from-source/
Linux From Scratch ... a quote from the vonos.net document: "This document was inspired by the TLDP document Software Building HOWTO which sadly is not actively maintained."
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- Nov 2019
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www.differencebetween.info www.differencebetween.info
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ram vs virtual
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stackoverflow.com stackoverflow.com
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swap vs virtual vs RAM
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CompizConfig Settings Manager's Place windows plug-in which will allow an application that isn't running to open on its particular workspace at its pre-defined X-Y coordinate,
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ometer.com ometer.com
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The thing is that each UI decision depends on countless other UI decisions. A simple example is keybindings. On UNIX/Linux, it’s nearly impossible to pick reasonable default bindings for global desktop navigation because they all conflict with bindings that some app is using. On Windows, the desktop navigation bindings are hardcoded, and no app uses them, because apps know for sure which bindings to avoid.
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flatpak.org flatpak.org
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github.com github.com
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(The exception is Bash on Windows, which uses native Bash.)
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docs.microsoft.com docs.microsoft.com
- Sep 2019
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www.tedfelix.com www.tedfelix.com
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Linux MIDI Guide
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- May 2019
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Sakaki's EFI Install Guide/Configuring Secure Boot
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www.chinnodog.com www.chinnodog.com
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Install Ubuntu with Full Disk Encryption and Encrypted Boot
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www.coolgeeks101.com www.coolgeeks101.com
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Full disk encryption Ubuntu, USB boot & detached LUKS header
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GRUB 2 does not have support for LUKS 2 and Ubuntu switched to it by default in this release
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www.theverge.com www.theverge.com
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we will include an in-house custom-built Linux kernel to underpin the newest version of the Windows Subsystem for Linux (WSL)
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- Apr 2019
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blog.heroku.com blog.heroku.com
- Mar 2019
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www.linuxbabe.com www.linuxbabe.com
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appimage.org appimage.orgAppImage1
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- Feb 2019
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linuxwacom.github.io linuxwacom.github.io
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A kernel driver is necessary to initalize the tablet and translate hardware-specific protocols into standard input events. We contribute patches directly to the Linux kernel, as well as maintain an out-of-tree kernel module that enables old kernels to work with many newer tablets.
必须安装内核驱动来初始化数位板和转换硬件特殊协议为标准输入事件.我们贡献了补丁直接加入到Linux内核,也维护了一个树型的内核模式让旧内核能够用于新的数位板.
如果系统对你的数位板无响应或鼠标无响应,尝试安装或更新input-wacom.
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- Dec 2018
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btrfs.wiki.kernel.org btrfs.wiki.kernel.org
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oletange.blogspot.com oletange.blogspot.com
- Nov 2018
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www.gnu.org www.gnu.org
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For compatibility head also supports an obsolete option syntax -[num][bkm][cqv], which is recognized only if it is specified first.
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‘-n [-]num’ ‘--lines=[-]num’ Output the first num lines.
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‘-c [-]num’ ‘--bytes=[-]num’ Print the first num bytes, instead of initial lines.
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- Oct 2018
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coreos.com coreos.comCoreOS1
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stackoverflow.com stackoverflow.com
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the concept of magic numbers goes back to unix and pre-dates the use of file extensions. The original idea of the shell was that all 'executable' would look the same - it didn't matter how the file had been created or what program should be used to evaluate it. The shell would look at the contents of the file and determine the appropriate file. Microsoft came along and chose a different approach and the era of file extensions was born. Then to make things 'nicer' for users microsoft chose to 'hide' these extensions and the era of trojan files which look like they are of one type but really have a different extension and are processed by a different file was born.
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www.microsoft.com www.microsoft.com
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Does any one else think that Microsoft is harming the end users windows 10 system stability with a malicious reason behind it? This has been brought up several times in the security forums.
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github.com github.com
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stackoverflow.com stackoverflow.com
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print every nth line into a row
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www.journalduhacker.net www.journalduhacker.net
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exec newgrp <newlyaddedgroupname1>
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lwn.net lwn.net
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linuxfr.org linuxfr.org
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planet.debian.org planet.debian.org
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planet.debian.org planet.debian.org
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la-vache-libre.org la-vache-libre.org
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planet.ubuntu.com planet.ubuntu.com
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planet.kernel.org planet.kernel.org
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www.ibm.com www.ibm.com
- Sep 2018
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www.stackrox.com www.stackrox.com
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www.iozone.org www.iozone.org
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Analyzing NFS Client Performance with IOzone
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- Aug 2018
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wikidevi.com wikidevi.com
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Edimax EW-7811UTC
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www.cyberciti.biz www.cyberciti.biz
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Wireless Network Speed, Signal Strength And Other Information
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www.edimax.com www.edimax.com
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AC600 Wireless Dual-Band Mini USB Adapter EW-7811UTC
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wireless.wiki.kernel.org wireless.wiki.kernel.org
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iw is a new nl80211 based CLI configuration utility for wireless devices
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askubuntu.com askubuntu.com
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Reinstalling a kernel from a chroot
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wiki.archlinux.org wiki.archlinux.org
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article covers the ATI/Radeon open source driver for older cards
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www.thegeekdiary.com www.thegeekdiary.com
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How to troubleshoot NFS transfer latency issues using “nfsiostat”
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cromwell-intl.com cromwell-intl.com
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Tune NFS Performance
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askubuntu.com askubuntu.com
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Cloning Encrypted SSD to larger SSD
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access.redhat.com access.redhat.com
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RHEL mount hangs: nfs: server [...] not responding, still trying
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askubuntu.com askubuntu.com
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stop LVM group prior to stop cypher
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wiki.archlinux.org wiki.archlinux.org
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dm-crypt wipe on an empty disk or partition
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- Jul 2018
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tedfelix.com tedfelix.com
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Add Users To "audio" Group
Why should I add myself to "audio" group?
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www.linuxtoys.org www.linuxtoys.org
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www.freedesktop.org www.freedesktop.org
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Multi-Seat on Linux
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- Apr 2018
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www.theatlantic.com www.theatlantic.com
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“The number of moving parts is so vast, and several of them are under the control of different groups. There’s no way you could ever pull it together into an integrated system in the same way as you can in a single commercial product with, you know, a single maniac in the middle.”
While there are indeed many moving parts modern Version Control Systems take care of that properly and automatically. The idea of a Benevolent dictatorship dictating the course of the software is not wrong, but it's been shown that it limits the software itself, no matter how smart or good the dictator is, he/she will never be able to think about every aspect and possible applications of the software. And considering this is a tool for research and experimentation, limiting the tool on purpose is not a very good idea, if you ask me. EVEN THEN, an open-source model leaves space for a Benevolent dictatorship (just as Linux and Google does for many of its FOSS projects), so that isn't really an argument against an open-source non-commercial developing model, in the worst case scenario.
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www.brendangregg.com www.brendangregg.com
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gobolinux.org gobolinux.org
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A more intuitive Linux structure
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- Mar 2018
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elixir.bootlin.com elixir.bootlin.com
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1) <hex_major><hex_minor> device number in hexadecimal represents itself * no leading 0x, for example b302. * 2) /dev/nfs represents Root_NFS (0xff) * 3) /dev/<disk_name> represents the device number of disk * 4) /dev/<disk_name><decimal> represents the device number * of partition - device number of disk plus the partition number * 5) /dev/<disk_name>p<decimal> - same as the above, that form is * used when disk name of partitioned disk ends on a digit. * 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the * unique id of a partition if the partition table provides it. * The UUID may be either an EFI/GPT UUID, or refer to an MSDOS * partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero- * filled hex representation of the 32-bit "NT disk signature", and PP * is a zero-filled hex representation of the 1-based partition number. * 7) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to * a partition with a known unique id. * 8) <major>:<minor> major and minor number of the device separated by * a colon.
this is all possible valid formats passed to root= option in linux boot command line
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unix.stackexchange.com unix.stackexchange.com
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How to Determine the Amount of RAM Slots In Use?
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- Feb 2018
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www.cyberciti.biz www.cyberciti.biz
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How to setup a UFW firewall on Ubuntu 16.04 LTS server
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unix.stackexchange.com unix.stackexchange.com
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All NFS mount options have good points and bad points
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help.ubuntu.com help.ubuntu.com
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autofs is a program for automatically mounting directories on an as-needed basis.
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- Jan 2018
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stackoverflow.com stackoverflow.com
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To understand why the DPI is important, consider these two plots:
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debian-administration.org debian-administration.org
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A couple of tricks with the secure shell
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unix.stackexchange.com unix.stackexchange.com
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newgrp adm
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askubuntu.com askubuntu.com
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Client Configuration Set up ~/.ssh/config
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superuser.com superuser.com
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cp -r /etc/skel/. /home/<new_user>
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- Dec 2017
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ebzzry.io ebzzry.io
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superuser.com superuser.com
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You terminate a session by killing its parent process, called the session leader. Find out which process it is with: ps -dN|grep pts/3
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unix.stackexchange.com unix.stackexchange.com
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There are many color schemes which are usually distributed together with vim
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wiki.ubuntu.com wiki.ubuntu.com
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Ubuntu bluetooth bugs
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unix.stackexchange.com unix.stackexchange.com
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echo 1 > /sys/block/(whatever)/device/delete
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bbs.csdn.net bbs.csdn.net
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0 6 * * * /root/zwk/test.sh >> /root/zwk/operate_`date +"\%Y\%m\%d"`.log 2>&1
crontab 执行命令，将对应运行日志按照日期进行存放
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- Nov 2017
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www.rittmanmead.com www.rittmanmead.com
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Linux cluster sysadmin -- OS metric monitoring with colmux
SSH keys, pdsh distributed execution, collectl and colmux monitoring
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stackoverflow.com stackoverflow.com
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find . -type d \( -path dir1 -o -path dir2 -o -path dir3 \) -prune -o -print
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rsanderlin.com rsanderlin.com
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BASH: Create User Accounts with Random Password
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www.cyberciti.biz www.cyberciti.biz
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How to Change a USER and GROUP ID on Linux For All Owned Files
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stackoverflow.com stackoverflow.com
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while IFS='=' read -r col1 col2 do echo "$col1" echo "$col2" done <testprop.properties
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timmurphy.org timmurphy.org
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In Bash you quite often need to check to see if a variable has been set or has a value other than an empty string. This can be done using the -n or -z string comparison operators.
Two most useful commands in bash
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blog.lenss.nl blog.lenss.nl
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/dev/sda
On my computer the device with the unused space is
/dev/sdb. You can see it in the graphical utility Disks.
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www.gnu.org www.gnu.org
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Finding Files
with find
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forums.plex.tv forums.plex.tv
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find /volume1/Movies /volume1/Music /volume1/Photos "/volume1/Home Videos" "/volume1/Music Videos" -type d -exec chmod 755 {} \;
recursively changing permissions with find, specifically for directories versus files
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docs.vmware.com docs.vmware.com
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/dev/cdrom on /mnt/cdrom type iso9660 (ro,nosuid,nodev)
VMware Workstation Player 12:
/dev/sr0 on /media/ubuntu/VMware Tools type iso9660 (ro,nosuid,nodev,relatime,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500,uhelper=udisks2)
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docs.vmware.com docs.vmware.com
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The name to use to register the guest operating system
What does this mean?
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www.larkinweb.co.uk www.larkinweb.co.uk
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Mounting file systems over two SSH hops
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- Oct 2017
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www.kernel.org www.kernel.org
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- Sep 2017
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clubmate.fi clubmate.fi
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Associative arrays in bash
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www.maketecheasier.com www.maketecheasier.com
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