Linux Find Command – How to Find All Files Older Than One Minute

It is

find directory -mtime +150

for the files not modified in this period (-150 will list the modified files).

The solution with mtime specifying seconds doesn't work on my linux systems that use find --version == find (GNU findutils) 4.4.2.

I get the following error:

mycomputer:~/new$ find . -mtime -60s
find: missing argument to `-mtime'
mycomputer:~/new$ find . -mtime -60seconds
find: missing argument to `-mtime'

However, I can use -mmin (for modified in the last m minutes), and can it can take in a decimal argument; e.g., the following finds files modified in the last 30 seconds.

find . -mmin 0.5

So for example; creating files last modified 1s, 6s, 11s, ... ago for the past 120 seconds, this command finds:

mycomputer:~/new$ for i in $(seq 1 5 120); do touch -d "-$i seconds" last_modified_${i}_seconds_ago ; done
mycomputer:~/new$ find . -mmin 0.5
.
./last_modified_1_seconds_ago
./last_modified_26_seconds_ago
./last_modified_11_seconds_ago
./last_modified_16_seconds_ago
./last_modified_21_seconds_ago
./last_modified_6_seconds_ago

So if you really need it in seconds you can do something like:

localhost:~/new$ for i in $(seq 1 1 120); do touch -d "-$i seconds" last_modified_${i}_seconds_ago ; done
localhost:~/new$ N=18; find . -mmin $(echo "$N/60"|bc -l)
./last_modified_1_seconds_ago
./last_modified_9_seconds_ago
./last_modified_14_seconds_ago
./last_modified_4_seconds_ago
./last_modified_12_seconds_ago
./last_modified_13_seconds_ago
./last_modified_8_seconds_ago
./last_modified_3_seconds_ago
./last_modified_5_seconds_ago
./last_modified_11_seconds_ago
./last_modified_17_seconds_ago
./last_modified_16_seconds_ago
./last_modified_7_seconds_ago
./last_modified_15_seconds_ago
./last_modified_10_seconds_ago
./last_modified_6_seconds_ago
./last_modified_2_seconds_ago