Shell Programming and Scripting

 if ["$date_of_file" -gt "$param"] ; then #Compare with the last saved parameter

if [ "$date_of_file" -gt "$param" ] ; then

usage: ssh [blah blah
awk: (my file name).txt
awk:                    ^syntax error
awk: (my file name).txt
awk:                    ^syntax error

# Read file cred.txt (with one IP per line), connect to servers (one at a time), and download directory listing
i=1
param=$(sed -n "{$1}p" /etldata/dev1/cdm/parm/cdm_param.txt) #Get the last saved parameter in cdm_param.txt (Date in format YYYYMMDD when the script was last successfully run)
param=$(date -d $param +%Y-%m) # Convert YYYYMMDD to YYYY-DD
while read line; do
	host=$line
	ssh $user@$host ls -l $directory $src_file_name$param'*' > ftpList$i.txt
	awk -F '{print substr($line,length($line)-13,10)}' ftpList$i.txt > Dates$i.txt #Save the date part of each file name
															  #in the directory listing downloaded previously.
	awk -F '{print substr($line,length($line)-30,27)}' ftpList$i.txt > Files$i.txt	#Save the name of each file.
		linenum=0 #Auxiliary variable for sed. Will be used to match the line where the condition is satisfied with the corresponding file.
		
		while read list; do
		linenum=$((linenum+1))
		date_of_file=$(date -d "$list" +%Y%m%d) #Convert the modification datetime of each file to format YYYYMMDD
		    if [ "$date_of_file" -gt "$param" ] ; then #Compare with the last saved parameter
			file=$(sed -n "${linenum}p" Files$i.txt)	#If the condition is satisfied, use sed to get the name of the file
														#in the same line of Files$i.txt.
		while read line2; do	#Connect again and download file when the above condition has been satisfied.
			sftp $user@$host <<END_RETRIEVE
			cd $was7sourcedir
			get $file
			quit
END_RETRIEVE
		done < 'cred.txt'
mv $file  home/p79793/FTPtest/$file'-0'$i #Rename file with its original name and append '-01', '-02', and so on, after the # of each server.	
		    fi
		done < Dates$i.txt
#rm ftpList$i.txt Dates$i.txt Files$i.txt #Delete auxiliary files. 																		   # REFER TO FILE jessica4.pdf TO SEE WHERE YOU HAVE TO 
																		   																	 
	i=$((i+1)) #Go to the next server
linenum=0
done < 'cred.txt'
echo $(date +'%Y%m%d') > /etldata/dev1/cdm/parm/cdm_param.txt 
rm cred.txt								  
exit 0