All Questions

How to make a custom ls command that echoes first n cubes to a txt file. How to make this command inside a .sh file that executes and the command is implemented. Can we use the alias command?

There is a CentOS.repo configuration: [base] name=CentOS-$releasever - Base baseurl=http://mirror.scalabledns.com/centos/7/os/$basearch/ gpgcheck=1 gpgkey=http://mirror.scalabledns.com/centos/7/os/...

my grub file corrupted and entered to rescue mode. after at shell prompt, unable to change chroot /mnt/sysimage. I tried to ln -s /bin/bash /mnt/sysimage/bin/sh but not changed, copies some libraries ...

I am working with an embedded device which communicates with my PowerPC CPU via PCIe. Due to the SDK constraints i have to use linux kernel version 4.1.8. This version doesn't have functions related ...

$ du -sh 0--989303831270119069.wt 1.6T 0--989303831270119069.wt $ ll -h 0--989303831270119069.wt -rw-rw-r-- 1 mongo mongo 3.6T Oct 22 18:17 0--989303831270119069.wt I want to know why? Is it a ...

echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/...

On a Unix server (Solaris) I would like to have a list of file like the output of ls -lrtR (i.e. all the files of a folder, included the ones in the subfolders, with the indication of their path and ...

I have pom.xml: <scm> <developerConnection>scm:git:ssh://git@gitlab.com:anton_patsev/maven-release-example3.git</developerConnection> <tag>HEAD</tag> </scm> How ...

My project is based on a Raspberry Pi distro - Raspbian. But I made changes to it. There are a lot of them: changes in config.txt, adding system services, installing new packages, change the image of ...

I have a script yummy.sh #!/bin/bash alias yumy='yum install -y ' yumprovision() { yumy } When I run this script got this bash: yumy: command not found why it's not loading alias in function?...

I am trying to change a line in a file without -t to include it; sudo sed -i.bak 's|create cifs.spnego * * /usr/sbin/cifs.upcall %k|create cifs.spnego * * /usr/sbin/cifs.upcall -t %k|g' /etc/...

Some people at our company are using a so called Cisco Jabber in Windows OS to improve handling of phone calls directly at the PC instead of using the telephone anymore. After installation, one has ...

I need to replace indentation in tree output with + signs so that instead of this: $ tree dir dir ├── dir1 │ ├── file1 │ └── file2 └── dir2 ├── file1 └── file2 it'd print this: $ tree ...

I follow the cobbler manual installed the cobbler, and I have imported some operating system isos into it. I started a vm, it entered this page for choosing OS: So, I have a question to it, where ...

I have several PDF files that all contain the string "R E A D I N G n n", where n n is the number of the corresponding reading. There is exactly one space between every character, i. e. " R E A D I N ...

I have created dbora script and when I manually run dbora script using command - /etc/init.d/dbora start , it start listener and database. I have created symbolic link to dbora. But when I reboot the ...

I found command like this (MYVAR=0 ./mybinary --my-arg myval) < ../input 5> ../output/5 1> ../output/1 What does 5> and 1> mean?

Getting error code 553 Anonymous users may not overwrite existing files ownership on home directory is 777

My /var lvm space is full. I have 500 GB space in /dev/sdb filesystem which is already mounted to /mnt/data point and it has data in it. I want to move some space from /dev/sdb to /var lvm without ...

I followed the instructions here under 'Command-line autocompletion' - but I still get [oh-my-zsh] plugin 'tldr' not found whenever I source .zshrc. So I tried creating a "tldr" folder in .oh-my-...

When I mount a CentOS 7.2 ISO in /mnt/centos7/, then list its contents, I get: (I can not copy, I only can take a screenshot.) Now I enter a CentOS public mirror repo detail directory: http://mirror....

I need to log onto 100 pc's and stop the processes ran by a certain user on them. Manually I would say ssh comp01 killall -u user Which also logs me out of the computer, so then I can run. ssh ...

I'm building a machine with Yoctoproject. I need TPM module for some purposes but I can't enable it. I tried this way: I ran bitbake -c menuconfig virtual/kernel, accessed Device Drivers > ...

I found some entries with a ! sign: wwwrun:!:496: ftp:!:459: The second part is the password, but normally it is set to x if it is empty. Whats the meaning of the !? Is it the password?

I have a bash function yumtelegraf() { cat <<EOF | sudo tee /etc/yum.repos.d/influxdb.repo [influxdb] name = InfluxDB Repository - RHEL \$releasever baseurl = https://repos.influxdata.com/rhel/\...

displays files in module folders without extension as well as adding them into an array. function toolbox { array=(`ls "$1" | xargs`) len=${#array[array{@]} for (( i=0; i<$len; i++ )) do ...

For example, in a program I want to get current cursor position on terminal (tput u7 or \E[6n on xterm): CSI P s n P s = 6 → Report Cursor Position (CPR) [row;column] as CSI r ; c R I write this ...

There's a plug-in (I believe this to be the right term) which is called 'tldr'. On the tldr page, you can see this screenshot: While I do have some color plug-ins installed (such as colorls and some ...

I have a shell command that I would like to time (e.g., a curl query). I don't want to time it once, but instead many times, so that I can get an empirical distribution of the execution time. How can ...

I deleted my question and ask new question with new approch. I can't find any devices (mobile, headset ) with bluetoothctl command.According to Scan, Pair, Connect to Bluetooth device from Ubuntu from ...

In order to clear caches, I usually invoke # echo 3 | tee /proc/sys/vm/drop_caches This requires root privileges. Why do I need to do this occasionally? Because it can have a huge impact on the ...

I have a file that I need to format a certain way. The records in the file have the following format; Record One Record Two Each record is separated by a blank line and each of the fields is ...

Let's say we have a file having following text: hello hel- lo world wor- ld test test he- lo words words If we just use the space as the delimiter, we would have hello: 1 world: 1 wor:1 ld:1 he: 1 ...

when using the iptables recent module, I can see the module settings here: ls -1 /sys/module/xt_recent/parameters/ and list setting for particular parameter: cat /sys/module/xt_recent/parameters/...

Many aspects of OpenWRT are controlled by the configuration files in the /etc/config directory. It appears that some options are not well documented. For example, the minidlna service has a ...

How can I use, preferably a single chmod command, which will allow any user to create a file in a directory but only the owner of their file (the user who created it) can delete their own file but no ...

I'm trying to count the time it takes for a code segment to complete. But I'm not looking to determine the time it takes for the process to run, but rather the time it took all things considered, eg ...

I have a latex program that creates an svg file looking like this: *** WARNING - you have selected SAFER, indicating you want Ghostscript to execute in a safer environment, but at the ...

I want to use a set of previous variables created to filter columns of a file called a.ped_snps.temp with awk within bash for loop. For this, I created bash variables: var_i_1, var_i_2, ... ...

I am relatively new to unix and linux bash scripting and have a few questions: First here is my script: for fileref in Ref/*.bed; do for filename in Data/*.bed; do bedops -e 1 $...

For example, if my home directory is 'FirstLast' and I am inside of /usr/FirstLast/Dir1/Dir2/Dir3 I want my prompt to read [username@srv1 Dir1] regardless of how deep in my directory I am. So the ...

How to tell my CentOS sendmail to send all the mails of my incoming SMTP using following credentials (which is a third party service, who deliver my mails)? Host smtp.mandrillapp.com Port 587 SMTP: ...

I have this: cat <<EOF 'use strict'; exports.default = { 'display names': {} } EOF > "$PWD/tmp.js" but this is syntactically wrong apparently, anybody know the syntax to do this?

My PC specs: Motherboard: Asus Maximus V Gene CPU: Intel Core i7 3770 GPU: nVidia GeForce GTX 780 Ti Monitor: SAMSUNG C27JG50QQI 27" 144Hz OS: Arch Linux 5.3.7-arch1-1-ARCH I have to use ...

I'm trying to figure out how to list the contents of a directory using a symbolic link to that directory. I read the answers here - Show contents of symbolic link The problem I'm having is just that ...

I'm having issues with sound on Linux Mint, it worked fine for long time but suddenly begin to saturate sporadically. First I thought it was software related issue but reinstalled Mint from zero and ...

I have the following code working in Debian system's: for File in "${Files[@]}"; do if test "`find $FolderDownload/$File -cmin -190`" ; then echo "File is new then 3 hours" # Set ...

I am running Ubuntu 16.04 LTS. This morning my fan was going crazy so I started killing processes Chrome with a million opened tabs, virtual machines all sorts of high memory stuff that I wasn't ...

I have one computer running Kali Linux via VirtualBox which is currently running a hydra ssh attack. I have one spare Raspberry Pi 3B+ laying around. Would it be a good idea to split the wordlist in ...

I have a MIDI keyboard "Impulse", and a raspi3. I want to connect the keyboard to the raspi, and having sounds without touching anything. So I use fluidsynth with jack as audio driver. Fluidsynth is ...