UNIX-1.3 UNIX Commands and Options HD

Make sure to subscribe to my channel for more videos on UNIX, Perl and SQL. facebook: facebook.com/fuzicast twitter: @fuzicast youtube: youtube.com/yuejdesigner85 du - data usage du -sh - find how much disk space used in current directory df - data file system df -h - find disk space usage cp - copies files cp file1 file2 - copy file1 to file2 cp file1 dir/file2 - copy file1 to file2 in dir cp file1 dir/ - copy file1 to dir with same filename cp -rf dir1 dir2 - recursively copy dir1 to dir2 cp -i file1 file2 - prompt before overwriting file2 cp file1 file2 file3 dir1 - copy multiple files to a directory cp -p file1 file2 - by default, permission is not preserved, use -p to do that cp -s file1 link1 - create soft link to file1 mv - change/move files mv file1 file2 - change filename from file1 to file2 mv -i file1 file2 - prompt before overwriting mv file1 dir1 - move file1 to dir1 mv dir1 dir2 - move dir1 to dir2 if dir2 exists, else change name from dir1 to dir2 head - display lines in file from beginning head file1 - display first 10 lines of file1 head -100 file1 - display first 100 lines of file1 tail - display lines in file from end tail file1 - display last 10 lines of file1 tail -100 file1 - display last 100 lines of file1 rm - remove file or directory rm file1 - remove file1 rm -rf dir1 - remove entire directory, never prompt rm -i dir1 - prompt before removing mkdir - create directory mkdir dir1 - create dir1 mkdir -m777 dir1 - create dir1 with specified permission mkdir -p dir1 - ignore error if dir1 already exists tar - archive file tar zcvf tarfilename.tar file1 file2 file3 - archive all these files into one tar ball, compressed tar xvf tarfilename.tar - extract files from a tar ball tar rf tarfilename.tar extra.txt - append extra.txt to existing tarfilename.tar (tarfilename.tar is not compressed) tar tvf tarfilename.tar - list out files in tar ball gzip - compress file gzip file1 - compress file1, new filename will have .gz extension gzip -d file1.gz - decompress file1.gz chmod - change permission chmod 777 file1 - change permission for file1 (rwxrwxrwx) chmod +x file1 - give executable permission for all to file1 (+r, +w) chmod u+x file1 - give executable permission for owner to file1 (g+x, o+x) chmod -R 777 dir1 - change permission for all contents in dir1