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The Linux is very easy if you follow the following points:Linux Filesystem Management, Badblocks, Badblocks Device, Linux Commands, Synchronize, Unmounts a Filesystem, Complement, Dnsdomainname, Hostname, Nisdomainname
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badblocks Used to search a disk or partition for badblocks. ( badblocks device ) (badblocks hda)
df Shows the disk free space on one or more filesystems. ( df –k, df -h )
du Shows how much disk space a directory and all its files contain. ( du
fsck Filesystem check. Must not be run on a mounted file system. ( fsck
sync Synchronize data on disk with memory. `sync' writes any data buffered in memory out to disk.
mount Used to mount a filesystem. Complement is umount. (mount
umount Unmounts a filesystem. Complement is mount. (umount
netconf A GUI interactive program to let you configure a network on Redhat systems. netconfig Another GUI step by step network configuration program. netstat Displays information about the systems network connections, including port connections, routing tables, and more. The command "netstar -r" will display the routing table. (netsat –rn) nslookup Used to query DNS servers for information about hosts.
tcpdump Dump traffic on a network. Prints out headers of packets that match the boolean expression. (tcpdump eth0)
telnet User interface to the TELNET protocol, setting up a remote console session. (telnet <remote system name/ip>)
traceroute Print the route that packets take to the specified network host. (traceroute <remote system name/ip>)
Communications commands (includes mail)
elm Electronic mail.
pine Program for internet news and e-mail, Can send documents, graphics, local & remote messages.
talk Lets two parties talk simultaneously.
mail To send a mail
System Time
cal Calendar. (cal, cal 2005)
date Print or set the system date and time. (date, date MMDDhhmm[[CC]YY][.ss])
hwclock Set or read the hardware CMOS clock.
uptime Reports how long the system has been running.
Linux Process Management
ps Get the status of one or more processes. PPID-parent process ID ; PID-process ID Eg: ps ax |more to see all processes including daemons Eg : ps –ef | grep
top The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of tasks currently being managed by the Linux kernel
