quinta-feira, 31 de outubro de 2013

ABC Of Bash Commands


Bash, Unix, Linux, Ubuntu, Debian, Bash shell, Unix shell, Bourne, shell commands, Bash programming, Bash commands, Bash tips, Bash tricks, tech news, news

When it comes to Bash, many could do with some help. So, here it is. 


Thursday, October 31, 2013:  You would all know that Bash replaced the older Unix shell Bourne, which was released in 1989. Since then, it has become the default shell in Linux and Mac OS X. But working on Bash isn’t the easiest thing in the world. That said, it isn’t the toughest either, like any other programming language. Practice definitely makes perfect. So, here we bring you an ABC of Bash commands to help make your life easier.

A
alias: If creating an alias is what you want, then this is it.
apropos: We’re not the only ones providing help. This command you to search through the Help manual pages.
apt-get: This one works on Debian and Ubuntu distros. It is used to install and search for software packages.
aptitude: See the similarity with the above command? This one does the same thing.
aspell: Got bad spellings? Use the spell checker.
awk:No, this command is not for awkward situations. It lets you find text and replace it. Also, you can sort, index and validate things in a database.

B
basename: Sometimes files and directories have suffixes to their names. This one strips them off it.
bash: GNU Bourne-Again Shell
bc: This command is an arbitrary precision calculator language
bg: bg could stand for background couldn’t it? Regardless, that’s what it does, sends to the background
break: Exit from a loop
builtin: Run a shell builtin
bzip2: When there’s ‘zip’ in the name, that’s what it does. It compresses or decompresses files that are named.

C
cal: Need a calendar? This command displays one.
case: In ‘case’ you want to perform a command conditionally. This is how to do it.
cat: In programming, ‘cat’ usually stands for concatenate. Here too, but this command displays the content of the files after concatenation.
cd: Change Directory
cfdisk: In Linux, this command is the partition table manipulator
chgrp: This is how you change the ownership of a group.
chmod:‘Ch’ is for change. This one changes the access permissions.
chown: This one sounds too much like clown! Anyway, it’s not funny though. It changes the owner and group of a file.
chroot: Using this you can run a command, but with a different root directory
chkconfig System services (runlevel)
cksum: It displays the CRC checksum ad byte counts.
clear: If you need to clear the terminal screen, use this command.
cmp: Compare two files
comm: Compare two sorted files line by line
command: Run a command - ignoring shell functions
continue: This is for resuming the next iteration of a particular loop.
cp: Make a copy of files to a different location.
cron: Daemon to execute scheduled commands
crontab: Scheduling is sometimes very important. This command does it, it schedules a command that will run at a specified time.
csplit: Split a file into context-determined pieces
cut: When you need to cut down a file into parts, this is the command to use.

Prasid Banerjee, EFYTIMES News Network 


Fonte: ABC Of Bash Commands

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