Line at the beginning of bash files - ANS #!/bin/bash
Character to search at the beginning of the line - ANS ^
Character to search at the end of the line - ANS $
Character to match any single character (with the exception of the newline character) - ANS ...
Line at the beginning of bash files - ANS #!/bin/bash
Character to search at the beginning of the line - ANS ^
Character to search at the end of the line - ANS $
Character to match any single character (with the exception of the newline character) - ANS
.
Character to match zero or more of the previous expression - ANS *
Character to match the previous expression one of more times - ANS +
The flag in the grep command that ignores commented lines - ANS -v
What does this regular expression search?
c.\{2\}t - ANS any word beginning with a c, followed by exactly any two characters, and
ending with a t
(i.e coat, cart)
Command to get an overview of pending jobs for the current user - ANS atq
(OR at -l)
Command to remove jobs - ANS atrm JOBNUMBER
Command to inspect commands that will run when a job is executed - ANS at -c
JOBNUMBER
Command used to manage jobs - ANS crontab
Command to list the jobs for the current user - ANS crontab -l
Command to remove all jobs for the current user - ANS crontab -r
Command to edit jobs for the current user - ANS crontab -e
, Command to remove all jobs, and replace with the jobs read from filename. (If no file is
specified, stdin is used.) - ANS crontab FILENAME
Order of fields in crontab file - ANS minutes (0-59), hours (0-23), day of month (1-31),
month (1-12), day of week (0-6), command
Character to specify "Do not care"/always in crontab file - ANS *
How to indicate an interval of x in the crontab file - ANS */x
(i.e */7 in the minutes column will run every 7 minutes)
What two locations are recurring system jobs defined? - ANS /etc/crontab
/etc/cron.d
What file ensures important jobs always run and are not skipped accidentally because a system
was turned off? - ANS /etc/anacron
Command to print systemd timer unit configuration files - ANS
systemd-tmpfiles-clean.timer
Command to purge temporary files
(rules for which files are removed are laid out in multiple config files) - ANS
systemd-tmpfiles --clean
Command to install tuned package AND
Command to enable and start it - ANS yum install tuned
systemctl enable --now tuned
Command used to change settings of the tuned daemon - ANS tuned-adm
Command to list all available tuning profiles - ANS tuned-adm list
Command to switch the active profile to a different one - ANS tuned-adm profile
PROFILE-NAME
(i.e. tuned-adm profile throughput-performance)
Nice level with the highest priority - ANS -20
Nice level with the lowest priority - ANS 19
Command to report a snapshot of current process - ANS ps
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