part5

1/1/04
#125
-695.00
Mortgage

1/1/04
#126
-56.89
PG&E

1/2/04
#127
-89.99
Safeway

1/3/04
+750.00
Pay Check

1/4/04
#128
-60.00
Visa
awk -vRS= -F"\n" 'NF=NF{print NR,$0}' file
awk  -vFS="\n" -vRS=""  '{print $1,$2,$3,$4}' file

a0="abc"
j=0
b="a"$j
echo ${!b}
eval echo \$$b

#!/bin/bash
echo "$1"
 ./test.sh \ abc\'www\'ss\"sd\"sss
#!/bin/bash
echo "$1"
 ./test.sh " abc\'www\'ss\"sd\"sss"
 abc\'www\'ss"sd"sss


possibly_hanging_job & { sleep ${TIMEOUT}; eval 'kill -9 $!' &> /dev/null; }

是不是在后台执行一个命令，若干时间后，如果还没结束，就干掉它？