Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 curl : Depends: libcurl4 (= 7.64.0-4+deb10u2) but 7.64.0-4+deb10u7 is to be installed

 sshd[11320]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=*.*.*.*  user=user_ya
Apr 29 15:16:47 server1 sshd[11320]: Failed password for user_ya from *.*.*.* port 54974 ssh2

free -h
              total        used        free      shared  buff/cache   available
Mem:           15Gi       9,4Gi       176Mi       4,8Gi       5,5Gi       638Mi
Swap:         3,0Gi       3,0Gi          0B

top
MiB Mem :  15495,3 total,    624,6 free,   9378,7 used,   5492,0 buff/cache

less /proc/zoneinfo:
 pages free     3328
        boost    0
        min      16
        low      20
        high     24
        spanned  4095
        present  3997
        managed  3840