UNIX Disk Usage Command Examples
How do I find out disk usage under UNIX operating systems using GUI, CLI and Perl / shell programs?Read answer to: "UNIX Disk Usage Command Examples"
View ArticleHowTo: UNIX / Linux Open TCP / UDP Ports
How do I open the TCP or UDP ports under UNIX / Linux like operating systems?Read answer to: "HowTo: UNIX / Linux Open TCP / UDP Ports"
View ArticleHowTo: Find Symlink under UNIX / Linux
How do I find symlink(s) under UNIX and Linux operating systems?Read answer to: "HowTo: Find Symlink under UNIX / Linux"
View ArticleApache2 NameVirtualHost *:80 has no VirtualHosts Error and Solution
Whenever I try to star my Apache 2 server under UNIX / Linux and get a warning as follows: [warn] NameVirtualHost *:80 has no VirtualHosts How do I fix this problem?Read answer to: "Apache2...
View Articleping command: TTL Expired In Transit Error and Solution
When I try to ping other UNIX / Linux / BSD or MS-Windows servers in our network I get the following message:TTL Expired In Transit How do I fix this problem?Read answer to: "ping command: TTL Expired...
View Articlevi Find And Replace Text Command
How do I find and replace (substitute) test using vi or vim text editor under UNIX / Linux / BSD or Apple OS X operating systems?Read answer to: "vi Find And Replace Text Command"
View ArticleLinux / UNIX: bc Convert Octal To Hexadecimal or Vise Versa
How do I convert from octal to hex number using bc UNIX / Linux command line utility?Read answer to: "Linux / UNIX: bc Convert Octal To Hexadecimal or Vise Versa"
View ArticleLinux / UNIX: Kill User Session
How do I kill all users session under Linux or UNIX operating system using command prompt?Read answer to: "Linux / UNIX: Kill User Session"
View ArticleLinux / UNIX: See If Particular Users Are Logged Into Server
How do I see if my friends or coworkers are logged into the same Linux or BSD or UNIX (AIX, HP-UX, Apple OS X) server / workstation as I am from a command line?Read answer to: "Linux / UNIX: See If...
View ArticleUbuntu Linux Stop a Process
How do I stop a process under Ubuntu Linux using command line and GUI tools?Read answer to: "Ubuntu Linux Stop a Process"
View ArticleBash Shell Count Number of Characters In a String or Word
How do I count and print particular character (say D or digit 7) in a string or variable under Bash UNIX / Linux shell?Read answer to: "Bash Shell Count Number of Characters In a String or Word"
View ArticleSSH: Agent Admitted Failure To Sign Using The Key Error And Solution
I've recently regenrated and uploaded a new public ssh-key using the ssh-copy-id command. Now I'm getting the following error:ssh root@server3 Agent admitted failure to sign using the key....
View ArticleLinux / Unix: Cat Command Examples
How do I use cat command on Linux or Unix-like operating systems?Read answer to: "Linux / Unix: Cat Command Examples"
View ArticleLinux / Unix: scp Copy All Hidden Dot Files
I'm using scp command to copy files from one server to another server. The problem is that I'm unable to copy all hidden files (such as .bash_history). How do I copy hidden files using the scp command...
View ArticleOpenSSH: ssh-add / ssh-agent Command Set Maximum Lifetime In Seconds
I'm using a Mac OS X and combination of ssh-agent+ssh-add to adds RSA or DSA identities to the authentication agent. ssh-agent provides me a secure way of storing the private key. However, I'd like to...
View ArticleHowto: Send The Content Of a Text File Using mail Command In Unix / Linux
I'd like to send an email with the content of a text file using mail command in Unix / Linux operating system. How do I do it?Read answer to: "Howto: Send The Content Of a Text File Using mail Command...
View ArticleWhere Is The Xorg.conf File Located under Unix / Linux / BSD?
I want to find and edit my xorg.conf file for tweaking and configure it for new settings. The problem is that I'm unable to find the file. According to my research, xorg.conf should in /etc/X11 or...
View ArticleUnix / Linux Shell: Get Third Field Separated by Forward Slash (/) Delimiter
I'm writing a shell script for automation purpose. The output the path of the current working directory is stored in $PWD or it can be obtained using the pwd command. How do I find out find out 3rd...
View ArticleUnix / Linux: grep Word Count Command
How do I count words using grep command under Linux / Unix like operating systems?Read answer to: "Unix / Linux: grep Word Count Command"
View ArticleAdd / Import .SQL file To MySQL Database Server
How do I import a MySQL .SQL text file to MySQL database sever using command line or gui tools?Read answer to: "Add / Import .SQL file To MySQL Database Server"
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