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Convert ps2pdf full size without cropping it : $ ps2pdf -dEPSCrop file.ps #Linux #Crop #PS #ps2pdf

Fasta sequence length: awk '/^>/ {if (seqlen){print seqlen}; print ;seqlen=0;next; } { seqlen += length($0)}END{print seqlen}' file.fa #Length #Linux #OneLiner

Delete size zero files from a folder: find . -size 0 -delete #Linux #Trick

MACHTYPE variable to know what type of machine you are compiling the software on. echo $MACHTYPE #Linux #MACHTYPE

Extract ten lines below matched string with grep: grep -A 10 "string" filename1 ; -B for above and -C for both #grep #Linux #Tricks #Lines #Matches

Re-install perl in Ubuntu: sudo aptitude reinstall perl #Perl #Ubuntu #Install #Linux

List all kernels dpkg --get-selections | grep "linux-image-[[:digit:]].*" | tr "\t" ";" | cut -d ";" -f1 #Kernels #Linux #List

Split the text file with line number in Linux: wc -l abc.txt and then: split -l 60000 abc.txt #Split #Break #Line #Ubuntu #Linux #Tricks

Number of thread in Linux: echo $(( `ps axms | wc -l` - 1)) #Thread #Info #Linux

Little correction, I guess you mean concatenate many files: $ for a in *.txt ; do cat $a >> newFile ; done #Linux #Tricks

Contact many files: $ for a in *.txt ; do cat $a >> newFile ; done #Linux #Tricks

Find a file with certain size and delete them: $ find . -name "see-D-d-ALN_*" -size -10k -delete #Delete #Size #Linux #Tricks

du -sh * will give you the size of all the directories,files etc in current directory in human readable format. #Linux #Size #Tricks #Folders #Files

Determine your current Java version in Linux OS: java -Xmx90m -version #Java #Linux #Version

Sync your broken transfer in Linux rsync -e ssh file host:/directory/. #rsync #scp #Linux