\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Usefull Linux Basic Commands to learn.\u00a0A command is an instruction given by a user telling a computer to do something.Commands are generally issues by typing them in at the command line and then pressing enter key,which passes them in to shell.\u00a0A shell is a program that reads commands that are types on a keyboard and then executes them.It is the most basic method for a user to interact with the system.
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| cd<\/td>\n | Changes directory<\/td>\n<\/tr>\n |
| cd ..<\/td>\n | Move up one directory<\/td>\n<\/tr>\n |
| cd ~<\/td>\n | Take you back to your home directory<\/td>\n<\/tr>\n |
| mkdir<\/td>\n | Make directory<\/td>\n<\/tr>\n |
| rmdir<\/td>\n | Remove directory<\/td>\n<\/tr>\n |
| ls<\/td>\n | list files<\/td>\n<\/tr>\n |
| mv<\/td>\n | Move file from one directory to another<\/td>\n<\/tr>\n |
| cp<\/td>\n | copy file with *.bak<\/td>\n<\/tr>\n |
| tat cvf *.tar dirname\/<\/td>\n | c->Create a new archive \nv->files which are processed \nf->following is the archive filename \nThe cvf option does not provide any compression<\/td>\n<\/tr>\n |
| tar cvzf \u00a0*.tar.gz dirname\/<\/td>\n | zip compression by using z option<\/td>\n<\/tr>\n |
| unzip filename<\/td>\n | unzip the file name<\/td>\n<\/tr>\n |
| tar -xzvf *.gz<\/td>\n | Extract the zipfile<\/td>\n<\/tr>\n |
| df<\/td>\n | disk free \ndf -H -Show the no of occupied blocks in GB,MB<\/td>\n<\/tr>\n |
| free<\/td>\n | Displays information about RAM and swap space<\/td>\n<\/tr>\n |
| touch filename.*<\/td>\n | Create file<\/td>\n<\/tr>\n |
| rm -f filename.*<\/td>\n | Remove file<\/td>\n<\/tr>\n |
| rm -rf filename.*<\/td>\n | Remove folder<\/td>\n<\/tr>\n |
| date MMDDHHmmYYY<\/td>\n | To set date<\/td>\n<\/tr>\n |
| Set time and date<\/td>\n | date -s “19 APR 2012 11:14:00<\/td>\n<\/tr>\n |
| About Permissions<\/td>\n | date -s “19 APR 2012 11:14:00<\/td>\n<\/tr>\n |
| About Permissions<\/td>\n | \u00a01)chmod 755(or)0755—-> drwxr-xr-x d->denotes type of file Group and world should not be enable to write access.thats denotes “-”<\/p>\n 2)chmod 644(or)0644——>drw-r–r–<\/p>\n 3)chmod 700(or)0700——->drwx——<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n |